Maryland Form 502INJ, the Injured Spouse Claim Form, is the form you file when you submit a joint Maryland tax return and the state takes your share of the refund to pay a debt that belongs only to your spouse. You file it to protect your part of the joint refund when your spouse owes past-due state or federal taxes, past-due child support, or another state debt sent to the Central Collection Unit, as explained in the official 502INJ form.
This form does not erase your spouse’s debt, and it does not split your marriage finances. It tells the Comptroller of Maryland, “That refund money is partly mine, and I should not lose my share for a debt I never owed.” Getting one line wrong can mean the state keeps your entire refund, so the details matter. Each year, thousands of joint Maryland refunds are flagged for offset through the state’s tax refund interception program, and a clean 502INJ is often the only thing that returns money to the spouse who did nothing wrong.
Here is what you will learn in this guide:
- 🧾 What Form 502INJ does and the exact four tests you must pass to qualify as an injured spouse.
- 📂 Every document and number to gather before you start, so you never stall halfway through.
- ✍️ A line-by-line walkthrough of every box on the form, with sample entries you can copy.
- 👨👩👧 Three full real-world examples that follow named filers through the whole form.
- ❓ Answers to the questions filers ask most, including the ones that trip people up at specific boxes.
What the Form Is and Who Must File It
Maryland Form 502INJ is the Injured Spouse Claim Form, carrying form number COM/RAD-070, issued by the Comptroller of Maryland. The version for the 2024 tax year carries a revision date of 08/24 printed in the upper left corner, so check that date to confirm you have the current form before you start. The Revenue Administration Division inside the Comptroller’s office is the unit that reads your form and decides how much of the refund belongs to you.
You are an “injured spouse” when your own money gets pulled into your spouse’s debt. The form lists four tests, and you must meet all four to qualify, per the 502INJ instructions. First, you filed a joint return with the spouse who owes the debt. Second, you received income, such as wages or interest. Third, you made payments, such as withholding or estimated tax. Fourth, the joint return had an overpayment that was, or will be, applied to your spouse’s past-due state or federal taxes, past-due child support, or other state debt referred to the Central Collection Unit.
If you fail even one test, the form will not help you. For example, a spouse with zero income and zero tax payments has no share to protect, so the claim returns nothing. The debt itself does not have to be tax debt. The most common reason Maryland grabs a joint refund is past-due child support, followed by old state tax bills and other debts handed to the Central Collection Unit.
This form is different from “innocent spouse” relief, and people mix them up. Injured spouse protects your share of a refund. Innocent spouse relief, requested on IRS Form 8857, asks to be released from tax owed because your spouse hid or understated income. Knowing which problem you have keeps you from filing the wrong form and wasting months.
Before You Start: Documents and Information You Need
Gather everything before you open the form. The 502INJ pulls numbers straight from your federal and Maryland returns, so if those returns are not done, the form cannot be finished. Filers who guess at numbers instead of copying them are the ones who get letters asking for corrections.
Here is your pre-filing checklist:
- Your completed federal Form 1040. The income section of the 502INJ copies wages, other income, and adjustments from this return; without it, you cannot fill Section A.
- Your completed Maryland Form 502 or Form 505. Section B copies additions, subtractions, deductions, and credits from these returns; missing it means blank boxes the state will reject.
- Both Social Security numbers. The form needs each spouse’s SSN, and a wrong digit triggers a processing hold while the state matches names to numbers.
- Both W-2 and 1099 forms. You must split withholding by who earned it, and the wage statements prove which spouse had what tax withheld.
- The exact name order from your joint return. Whoever is listed first on the joint return must be listed first here, so have that return in front of you.
- The amount and type of the debt. Knowing whether it is child support or a tax bill tells you which agency intercepted the refund and where your money may come from.
- Your current mailing address. If you moved, you need the address from the joint return too, because one box asks whether the address changed.
- A blue or black ink pen. The form states you must print in blue or black ink only, and other colors can be rejected by scanners.
- Estimated tax payment records, if any. Each spouse claims their own estimated payments, and you need the proof to split them correctly.
If any item is missing, stop and get it. A 502INJ filed with guessed figures or a blank income line forces the Revenue Administration Division to set the claim aside, and that delay can stretch your wait by months while your refund sits with the intercepting agency.
Where to Get the Form and How to Access It
The fastest way to get Form 502INJ is to download it from the Maryland Comptroller forms page. The form is a free, printable PDF, and you should print the page that matches the tax year you are filing. Filing the wrong year’s form is a common error, because the box layout and line references change over time.
You can also request the form by other channels if you cannot print at home. You may email a request to TAXFORMS@marylandtaxes.gov, and the office will send the form to you. You may also call 1-800-638-2937 toll-free, or 410-260-7951 from Central Maryland, to ask for a paper copy by mail, as listed in the official instructions.
A key rule controls when you can use a paper form versus electronic filing. In most cases you attach the paper 502INJ to the front of your paper Maryland return. The one exception is business credits: the instructions state you must file your return electronically if line 9 of the 502INJ shows business tax credits from Form 500CR. If that is your situation, plan to e-file the whole return rather than mailing it.
One more access point worth knowing is the state’s own filing system, Maryland iFile. While the injured spouse claim is most often mailed on paper, the iFile portal and the marylandtaxes.gov site are where you confirm deadlines, refund status, and which return form, 502 or 505, applies to you.
Step-by-Step: How to Fill Out Form 502INJ Line by Line
The 502INJ has two main parts on a single page: a top block for Taxpayer Information, and a grid called Allocation Between Spouses with three columns labeled JOINT, INJURED SPOUSE, and OTHER SPOUSE. Below that sit the address boxes, the special checkboxes, and the signature block. Work through them in order, copying numbers from your finished returns. Remember one rule that controls the whole form: you split items between the two columns, and the Revenue Administration Division does the final math on several lines, so you are sorting income by owner, not computing the refund yourself.
Check Box: “Check here if injured spouse”
This box at the top tells the state the form is an active injured spouse claim. You simply mark the box to flag yourself as the injured spouse making the claim.
To answer it, place a clear check or X in the box labeled Check here if injured spouse at the top right of the form. Use blue or black ink, and make the mark fill the box without spilling outside it.
For example, Maria Lopez checks the box because her joint refund was taken for her husband’s old state tax bill, and she wants her share back.
A common edge case is when both spouses think they are injured. Only the spouse who does not owe the debt is the injured spouse, so only that person checks the box and signs later.
A common mistake here is leaving the box blank because the rest of the form looks complete. If the box is empty, the form can be read as informational rather than a claim, and your refund stays with the intercepting agency.
A misconception is that checking this box admits fault or debt. It does the opposite; it states you are not responsible for the debt and are protecting your own money.
Check Box: Divorced or Separated Refund in Your Name Only
This box asks whether you want the refund issued in your name only because you are now divorced or separated from the spouse you filed with. It exists so a separated filer does not get a check made out jointly to an ex.
To answer it, check this box only if you are divorced or separated from the spouse on the joint return and you want your share paid to you alone. Leave it blank if you are still married and living together.
For example, David Chen checks this box because he divorced after filing the joint return and does not want a check he would have to get his ex-spouse to endorse.
An edge case is a couple who is separated but not yet divorced. The form allows separated filers to check it too, so you do not have to wait for a final divorce decree.
A common mistake is checking the box while still happily married, which can route your refund in a way that confuses the issuing agency and slows payment.
A misconception is that this box starts or proves a divorce. It does neither; it only directs how the refund check is issued.
Taxpayer Information: First Name, MI, Last Name, and Social Security Number
This top block asks for the name and Social Security number of the spouse listed first on the joint return. It anchors the whole claim to the exact return the state already has on file.
To answer it, enter the first name, middle initial, and last name, then the nine-digit SSN, of whichever spouse appears first on the joint return, exactly as shown there. Print in capital letters where possible and write the SSN with no extra marks.
For example, if the joint return lists James Carter first, then James Carter and his SSN go on this top line even if his wife is the injured spouse filing the form.
An edge case is a name change after marriage or divorce. Use the name as it appears on the joint return being corrected, not your current name, so the records match.
The most common mistake on this block is reversing the spouses so the injured spouse’s name goes first. The instructions are firm: the spouse shown first on the original return must be shown first here, and reversing them causes a mismatch hold.
A misconception is that the first-listed person must be the injured spouse. The order has nothing to do with who is injured; it only mirrors the joint return.
Taxpayer Information: Spouse’s First Name, MI, Last Name, and Social Security Number
This second line asks for the name and SSN of the spouse listed second on the joint return. Together with the first line, it tells the state both halves of the couple.
To answer it, enter the second spouse’s first name, middle initial, last name, and SSN exactly as written on the joint return. Double-check every digit of the SSN against the original return.
For example, James Carter is on line one, so his wife Anna Carter and her SSN go on this second line, and Anna is the one checking the injured spouse box.
An edge case is a deceased spouse. If the other spouse died, you still enter their name and SSN as shown on the joint return for the year you are claiming.
A common mistake is copying the SSN from a W-2 or memory instead of the joint return. A single wrong digit stalls the match and delays your share of the refund.
A misconception is that you can skip this line if your spouse is the one with the debt. Both names are required; the form needs both SSNs to split the refund.
Address Boxes: Street, City, State, ZIP, and Foreign Address Fields
This section asks for the mailing address where you want notices and, in some cases, the refund sent. It is how the Revenue Administration Division reaches you about the claim.
To answer it, print your current street address, city or town, state, and nine-digit ZIP+4. Use the foreign country, province, and postal code lines only if your address is outside the United States.
For example, Anna Carter writes 410 Maple Street, Apartment 2B, Towson, MD 21204 in the address boxes.
An edge case is a P.O. Box. If your mail goes to a P.O. Box, you may enter it on the street address line, since the form accepts a PO Box, number, and street.
A common mistake is entering an old address after a move without flagging it on the address-change box below. Notices then go to the wrong place, and you may miss a request for more information.
A misconception is that this address controls who gets the refund. If the refund was already intercepted, your share is issued by the intercepting agency, not simply mailed to this address.
Address-Change Question: “Is the address on your joint return different from the address shown above?”
This question asks whether the address you just wrote differs from the one on the joint return. It alerts the state that your contact information has changed since filing.
To answer it, check Yes if the address above is new and different from the joint return, or No if it is the same.
For example, Anna Carter checks Yes because she moved to a new apartment after filing the joint return with her old address.
An edge case is a couple who filed jointly but now lives apart. The injured spouse answers for the address shown above, which is their own current address.
A common mistake is leaving this blank, which leaves the state unsure which address is current and can send mail to the old one.
A misconception is that checking Yes updates your address for all tax records. It flags the change for this claim, but you may still need to update your address with the Comptroller separately.
Allocation Section A, Line 1: Wages (Federal Form 1040)
This line splits the wages reported on your joint federal Form 1040 between the two spouses. It is the heart of proving how much of the income, and the refund, is yours.
To answer it, enter total joint wages in the JOINT column, then place each spouse’s wages in the INJURED SPOUSE and OTHER SPOUSE columns. Allocate wages to the spouse who actually earned them, using the W-2s.
For example, Anna Carter earned $48,000 and James earned $0, so Anna writes 48,000 in the JOINT and INJURED SPOUSE columns and 0 in the OTHER SPOUSE column.
An edge case is a spouse with two jobs. Add both W-2s for that person and place the total in that spouse’s column.
A common mistake is splitting wages 50/50 out of habit. Wages belong to the earner, and an even split can shrink your protected share or trigger a correction.
A misconception is that wages must be divided to seem “fair.” The form wants accuracy, not fairness; the earner keeps the wages.
Allocation Section A, Line 2: Other Income
This line splits all income that is not wages, such as interest, dividends, and investment income. It captures the rest of the federal income picture.
To answer it, enter total other income in the JOINT column, then allocate each item to the spouse who earned it. Income from joint accounts or ventures, such as joint-account interest, is divided equally between spouses.
For example, the Carters had $1,000 of interest in a joint savings account, so each column gets 500.
An edge case is investment income in one spouse’s name only. That income goes entirely to that spouse, not split.
A common mistake is dividing solely-owned investment income equally. Only joint income splits evenly; individual income follows the owner.
A misconception is that small amounts can be skipped. Every income item affects the split, so report each one.
Allocation Section A, Line 3: Adjustments to Income
This line splits federal adjustments to income, such as certain retirement or student loan adjustments. It assigns each adjustment to its rightful owner.
To answer it, enter total adjustments in the JOINT column, then allocate each adjustment to the spouse to whom it belongs.
For example, James paid $2,000 in deductible student loan interest, so 2,000 goes in his OTHER SPOUSE column.
An edge case is a shared adjustment tied to a joint activity. If it cannot be tied to one spouse, treat it like other joint items and divide it evenly.
A common mistake is forgetting adjustments entirely, which inflates the income on one side and skews the refund split.
A misconception is that adjustments do not matter for the refund. They change taxable income, so they change each spouse’s share.
Allocation Section B, Line 1: Additions (Form 502 Line 6 or Form 505 Line 20)
This line moves Maryland addition modifications from your state return into the split. Additions raise Maryland taxable income.
To answer it, copy the additions from Form 502, Line 6 or Form 505, Line 20 into the JOINT column, then allocate individual additions to the spouse they belong to. Joint additions divide equally.
For example, Anna had a $300 Maryland addition tied to her account, so 300 goes in her INJURED SPOUSE column.
An edge case is an addition tied to jointly held property. Split that one evenly between both columns.
A common mistake is copying the wrong line number from the state return, which puts a bad figure into the split.
A misconception is that additions help the injured spouse. They raise income, so they belong to whoever caused them, not wherever helps most.
Allocation Section B, Line 2: Subtractions (Form 502 Line 15 or Form 505NR Line 7)
This line splits Maryland subtractions, which lower state taxable income. It includes a special rule for child and dependent care.
To answer it, copy subtractions from Form 502, Line 15 or Form 505NR, Line 7, then allocate individual subtractions to the right spouse. The child and dependent care subtraction must go to the spouse claiming that child’s exemption, and joint subtractions like income tax refunds divide equally.
For example, Anna claims the children, so the $1,200 child care subtraction goes in her INJURED SPOUSE column.
An edge case is a state tax refund subtraction from a joint prior-year refund. Split that evenly.
A common mistake is giving the child care subtraction to the wrong spouse. It must follow the exemption, and a mismatch can be corrected against you.
A misconception is that any subtraction can be parked on the injured spouse to boost the refund. Each follows its true owner.
Allocation Section B, Line 3: Deductions (Form 502 Line 17 or Form 505NR Lines 10A, 10B)
This line reports your Maryland deduction, whether standard or itemized. Here you only enter the total, because the state finishes the split.
To answer it, enter the deduction amount, itemized or standard, in the JOINT column only. The Revenue Administration Division will allocate the deductions between spouses for you.
For example, the Carters took a $4,850 standard deduction, so 4,850 goes in the JOINT column and the other columns stay blank.
An edge case is itemized deductions tied to one spouse. You still enter the joint total; the Division handles the division.
A common mistake is trying to split the deduction yourself across the two spouse columns. That can conflict with the state’s own math and cause a mismatch.
A misconception is that leaving the spouse columns blank is an error. On this line, blank spouse columns are correct because the Division allocates it.
Allocation Section B, Line 4: Exemptions
This line splits the number of exemptions claimed on your Maryland return. It uses whole numbers, not dollars.
To answer it, enter the exemption number from the exemptions area of your return, then split it so each spouse claims the exemptions they would get on a separate return. Exemptions must be in whole numbers only; three exemptions cannot be split as 1½ and 1½.
For example, the Carters claim 4 exemptions, with Anna claiming herself and both children (3) and James claiming himself (1), so the columns read 4, 3, and 1.
An edge case is an odd number with shared dependents. Decide who claims each child as if filing separately, keeping every number whole.
A common mistake is splitting an exemption in half. Half-exemptions are not allowed and will be rejected or recalculated.
A misconception is that dependents must be split evenly. Each spouse claims the exemptions they personally would be entitled to.
Allocation Section B, Line 5: Earned Income and/or Poverty Level Credit
This line reports the Maryland earned income credit or poverty level credit from your joint return. You enter it, but the state splits it.
To answer it, enter the credit as claimed on Form 502, Lines 22 and 23 or Form 505, Line 33 in the JOINT column. The Revenue Administration Division will allocate these credits.
For example, the Carters claimed a $400 earned income credit, so 400 goes in the JOINT column.
An edge case is qualifying for one credit but not the other. Enter only the credit you actually claimed.
A common mistake is splitting the credit yourself, which conflicts with the state’s allocation.
A misconception is that the injured spouse keeps the whole credit. The Division decides each share based on the return.
Allocation Section B, Line 6: Withholding Taxes (Form 502 Line 40 or Form 505 Line 43)
This line splits Maryland income tax withheld from each spouse’s pay. Withholding is one of the biggest drivers of your refund share.
To answer it, copy withholding from Form 502, Line 40 or Form 505, Line 43, then give each spouse the Maryland withholding shown on their own W-2s and 1099s.
For example, Anna’s W-2 shows $2,300 of Maryland withholding and James’s shows $0, so Anna writes 2,300 in her column.
An edge case is a spouse with multiple W-2s. Add the Maryland withholding boxes from all of that spouse’s forms.
A common mistake is splitting joint withholding evenly. Each spouse claims their own withholding, and an even split can wrongly hand part of your refund to the debt.
A misconception is that withholding follows the higher earner. It follows whoever’s wage statement shows it, period.
Allocation Section B, Line 7: Refundable Earned Income Credit (Form 502 Line 42)
This line reports the refundable earned income credit from your joint Maryland return. You enter the total; the state allocates it.
To answer it, enter the refundable earned income credit from Form 502, Line 42 in the JOINT column. The Revenue Administration Division will allocate this amount for you.
For example, the Carters had a $250 refundable earned income credit, so 250 goes in the JOINT column.
An edge case is having no refundable credit. Leave the line blank if your return claimed none.
A common mistake is double-counting this with Line 5. They are separate lines; copy each from its own return line.
A misconception is that you must split this credit yourself. The Division handles it once you enter the joint figure.
Allocation Section B, Line 8 and 8a: Estimated Taxes and PTE Tax Paid
Line 8 splits estimated tax payments, and Line 8a covers pass-through entity (PTE) tax paid on a member’s share of income. Both relate to taxes paid in beyond withholding.
To answer Line 8, each spouse claims their own estimated payments; if joint payments cannot be split, the Revenue Administration Division will allocate them for you. For Line 8a, if you are a PTE member whose entity elected to pay the tax, enter the credit from Form 502CR, Part CC, Line 9, attach Maryland Schedule K-1 (Form 510/511), and add back the amount as the instructions require.
For example, James paid $1,000 in estimated taxes under his own SSN, so 1,000 goes in the OTHER SPOUSE column on Line 8.
An edge case is a single joint estimated payment for both spouses. If you cannot prove who paid what, let the Division allocate it.
A common mistake is claiming a spouse’s estimated payment under the wrong column, which moves your money toward the debt.
A misconception is that 8a is optional for PTE members. If you take the credit, the add-back is required, not a choice.
Allocation Section B, Line 9: Other Credits
This line splits remaining credits, such as credit for taxes paid to another state and business tax credits. It carries a special e-file rule.
To answer it, copy other credits from Form 502, Lines 24, 25, and 43 or Form 505, Lines 34, 35, and 46. Each spouse claims their own credit for taxes paid to another state, and business tax credits go to the spouse with the business income.
For example, Anna earned wages in Virginia and claimed a $150 credit for taxes paid there, so 150 goes in her column.
An edge case is a business credit from Form 500CR. The instructions state you must file electronically if Line 9 shows business tax credits from Form 500CR, so you cannot mail the claim.
A common mistake is splitting another-state credit evenly. It belongs to the spouse who paid the other state’s tax.
A misconception is that business credits help the injured spouse. They follow the business income owner, even if that is the debtor spouse.
Signature of Injured Spouse, Date, and Daytime Telephone Number
This block is where the injured spouse signs under penalty of perjury. It makes the claim official and legally binding.
To answer it, the injured spouse signs by hand, writes the date as MM/DD/YYYY, and prints a daytime phone number where the state can reach them.
For example, Anna Carter signs her name, writes 04/10/2026, and lists 410-555-0182.
An edge case is a joint claim where both want to sign. Only the injured spouse’s signature is required, since they are the one making the claim.
A common mistake is leaving the form unsigned. An unsigned 502INJ is not a valid claim, and the refund stays with the intercepting agency.
A misconception is that an electronic name typed in software counts the same as a wet signature on a mailed form. On a paper filing, you must physically sign in blue or black ink.
Paid Preparer Section: Signature, PTIN, Firm, and Address
This block is for a paid tax preparer who completed the form for you. The law requires preparers to sign and give a PTIN.
To answer it, leave it blank if you prepared the form yourself. If a paid preparer helped, they sign, date, and enter their PTIN, firm name, and mailing address, all required by law.
For example, self-filer Anna Carter leaves this blank, while a couple who hired a CPA would have the CPA sign and list a PTIN.
An edge case is a free volunteer preparer. Many volunteer programs still sign and provide identifying details, so ask your preparer.
A common mistake is a paid preparer skipping the PTIN. The PTIN is required by law, and leaving it off can delay processing.
A misconception is that the preparer’s signature replaces yours. It does not; the injured spouse must still sign their own block.
Three Filled-Out Examples Using Real Scenarios
Below are three common situations that lead people to file Form 502INJ. Each follows one named filer through the form so you can see what goes in each major section.
Example 1: Anna Carter, Spouse Owes Back Child Support
Anna files jointly with her husband James, who owes past-due child support from a prior relationship. Maryland intercepts their joint refund, and Anna files 502INJ to recover her share.
| Form Section | What Anna Enters |
|---|---|
| Check here if injured spouse | Checks the box |
| First name / SSN (first on joint return) | James Carter, James’s SSN |
| Spouse’s name / SSN | Anna Carter, Anna’s SSN |
| Address | 410 Maple Street, Apt 2B, Towson, MD 21204 |
| Section A, Line 1 Wages | JOINT 48,000, Injured Spouse 48,000, Other Spouse 0 |
| Section B, Line 4 Exemptions | JOINT 4, Injured Spouse 3, Other Spouse 1 |
| Section B, Line 6 Withholding | JOINT 2,300, Injured Spouse 2,300, Other Spouse 0 |
| Signature of injured spouse | Anna Carter, 04/10/2026, 410-555-0182 |
Example 2: Marcus Bell, Spouse Owes Past-Due State Taxes
Marcus marries Tina, who has an old Maryland tax bill from before the marriage. Their first joint refund is taken to pay Tina’s back taxes, so Marcus files 502INJ.
| Form Section | What Marcus Enters |
|---|---|
| Check here if injured spouse | Checks the box |
| First name / SSN (first on joint return) | Tina Bell, Tina’s SSN |
| Spouse’s name / SSN | Marcus Bell, Marcus’s SSN |
| Address-change question | Checks No (same address) |
| Section A, Line 1 Wages | JOINT 61,000, Injured Spouse 55,000, Other Spouse 6,000 |
| Section A, Line 2 Other income (joint interest) | JOINT 400, Injured Spouse 200, Other Spouse 200 |
| Section B, Line 6 Withholding | JOINT 3,100, Injured Spouse 2,900, Other Spouse 200 |
| Signature of injured spouse | Marcus Bell, 03/22/2026, 301-555-0147 |
Example 3: David Chen, Divorced and Wants Refund in His Name Only
David filed a joint return with his then-wife Lisa, who owes a state debt referred to the Central Collection Unit. They divorced after filing, and David wants his share paid to him alone.
| Form Section | What David Enters |
|---|---|
| Check here if injured spouse | Checks the box |
| Divorced/separated, refund in my name only | Checks the box |
| First name / SSN (first on joint return) | David Chen, David’s SSN |
| Spouse’s name / SSN | Lisa Chen, Lisa’s SSN |
| Address-change question | Checks Yes (moved after divorce) |
| Section A, Line 1 Wages | JOINT 72,000, Injured Spouse 72,000, Other Spouse 0 |
| Section B, Line 4 Exemptions | JOINT 2, Injured Spouse 1, Other Spouse 1 |
| Signature of injured spouse | David Chen, 04/01/2026, 240-555-0199 |
How to File the Completed Form
Form 502INJ is not filed by itself. You attach it to the front of your Maryland tax return and write “INJURED SPOUSE” in the upper left corner of the return, exactly as the instructions direct. Because the claim rides with your return, you have one main paper channel and one electronic channel depending on your situation.
Filing by mail (most common). Attach the signed 502INJ to the front of your completed Form 502 or 505, write “INJURED SPOUSE” on the corner, and mail it to the address printed in your Maryland return instructions. There is no separate fee to file the 502INJ; you only pay any tax you actually owe. Use first-class mail, and for proof keep a copy of the full packet plus a certified-mail or tracking receipt, since that receipt is your evidence the claim was sent on time. Paper claims take longer to process, so expect added weeks compared to a plain return.
Filing electronically (required for some). If Line 9 shows business tax credits from Form 500CR, you must e-file the whole return. E-filing through approved software is faster, with no postage and quicker confirmation. Your proof of filing is the electronic acceptance confirmation, which you should save or print.
Checking status and deadlines. The Maryland individual filing deadline tracks the federal date, with the 2025 tax year return due April 15, 2026, as shown on Maryland iFile. You can monitor your refund through the Comptroller’s refund status tools. Keep your daytime phone line open, because the Revenue Administration Division may call or write if it needs more information.
What Happens After You File
After you file, the Comptroller’s Office calculates the amount that may be due to you based on the figures you allocated, and the form states you will be notified of that amount. You do not compute your final refund share; the Revenue Administration Division does, which is why several lines say the Division will allocate for you. Expect this to take longer than a normal refund, because a human reviews the split.
If your refund was already intercepted, your approved share is issued directly from the intercepting agency, not always as a fresh check from the Comptroller. For example, if child support enforcement grabbed the refund, your portion comes back through that channel once the claim is approved. This is why knowing which agency took the money helps you track your payment.
The state may send a letter asking for missing documents, a clearer allocation, or proof of withholding. Respond fast, because the clock on your refund does not move until the Division has what it needs. If you disagree with the calculated amount, the notice you receive will explain how to ask questions or seek a review.
Keep your full filing copy until the matter is fully resolved and the money is in hand. A complete copy lets you answer any follow-up quickly and proves what you reported if a dispute arises later.
Mistakes to Avoid When Filling Out the Form
- Listing the wrong spouse first. The first-listed spouse must match the joint return, and reversing them triggers a name-and-SSN mismatch hold.
- Forgetting to check the injured spouse box. A blank box can make the state treat the form as informational, so your refund stays with the debt.
- Leaving the form unsigned. An unsigned 502INJ is not a valid claim, and the Division will not release your share.
- Splitting wages 50/50. Wages belong to the earner, and an even split can shrink your protected refund.
- Splitting your own withholding evenly. Each spouse claims their own withholding, and sharing it sends part of your money to the debt.
- Dividing the deduction yourself. Line 3 deductions are entered as a joint total only, and self-splitting conflicts with the Division’s math.
- Using half-exemptions. Exemptions must be whole numbers, so 1½ is rejected or recalculated.
- Copying the wrong line numbers. Pulling the wrong figure from Form 502 or 505 puts bad data into the split and delays processing.
- Filing the wrong tax year’s form. Box layouts and line references change, so an old form can be rejected.
- Mailing a claim that must be e-filed. Business credits from Form 500CR on Line 9 require electronic filing, and mailing it will stall the return.
- Using the wrong ink. The form requires blue or black ink, and other colors can fail scanning.
- Not attaching the form to the return. A 502INJ filed alone, without “INJURED SPOUSE” on the corner, can be separated and lost.
Do’s and Don’ts
Do’s
- Do copy numbers straight from your finished returns, because the form is built to mirror your federal and Maryland figures exactly.
- Do allocate each item to its true owner, since accuracy, not an even split, is what protects your share.
- Do file a separate 502INJ for every year affected, because the instructions require one form per year you claim.
- Do keep a full copy and proof of mailing, so you can answer follow-up letters and prove timely filing.
- Do write “INJURED SPOUSE” on the return’s upper left corner, because that flag routes your packet for special handling.
- Do answer state letters fast, since your refund timeline pauses until the Division has what it asked for.
Don’ts
- Don’t reverse the spouse order, because a mismatch with the joint return causes a processing hold.
- Don’t split solely-owned income evenly, since only truly joint income is divided 50/50.
- Don’t self-allocate the lines the Division handles, because deductions and credits on those lines conflict if you split them.
- Don’t file the form by itself, since it must be attached to the front of your return.
- Don’t guess at SSNs or figures, because one wrong digit stalls the match and delays your money.
- Don’t confuse this with innocent spouse relief, since that is a different problem filed on IRS Form 8857.
Pros and Cons of Filing on Your Own vs. With Help
| Filing on Your Own (Pro Se) | Filing With Professional Help |
|---|---|
| Pro: No preparer fee, since the form itself costs nothing to file. | Pro: A preparer knows how to allocate tricky income and credits correctly. |
| Pro: You control the timing and can mail it the moment your return is ready. | Pro: A pro can handle the e-file rule for Form 500CR business credits without confusion. |
| Pro: Simple, single-income cases are easy to complete yourself. | Pro: Help reduces the risk of a mismatch hold that delays your refund for weeks. |
| Pro: You learn your own tax picture line by line. | Pro: A preparer can respond to state letters and disputes on your behalf. |
| Pro: No need to share personal records with a third party. | Pro: Complex cases with PTE credits or multi-state income get expert handling. |
| Con: One wrong allocation can send your refund to the debt. | Con: Preparer fees add cost to a refund you are trying to protect. |
| Con: You must track deadlines and proof of mailing yourself. | Con: You still must sign and stay responsible for the claim’s accuracy. |
| Con: Mistakes may not surface until a state letter arrives. | Con: Finding a preparer who knows Maryland injured spouse rules takes effort. |
| Con: Complex income splits can overwhelm a first-time filer. | Con: You share sensitive financial details with another party. |
| Con: No one reviews your math before it reaches the state. | Con: Scheduling around a preparer can slow a time-sensitive filing. |
Injured Spouse vs. Innocent Spouse vs. Federal Form 8379
| Relief Type | What It Does |
|---|---|
| Maryland 502INJ (Injured Spouse) | Protects your share of a joint Maryland refund taken for your spouse’s separate debt, like child support or back state taxes. |
| Innocent Spouse, IRS Form 8857 | Asks the IRS to release you from tax owed because your spouse understated or hid income on a joint return. |
| Federal Injured Spouse, IRS Form 8379 | Protects your share of a federal refund offset for your spouse’s federal debt; it does not cover your Maryland refund. |
FAQs
Do I need to list the spouse who owes the debt first on the form?
No. You list whichever spouse appears first on the joint return, regardless of who owes the debt, because the form must mirror the original return’s order.
Do I write my withholding and my spouse’s withholding split evenly on Line 6?
No. Each spouse claims only the Maryland withholding shown on their own W-2 and 1099 forms, so you do not divide it evenly.
Do I split deductions myself on Line 3?
No. You enter the deduction as a joint total only, and the Revenue Administration Division allocates it between you.
Do I have to enter whole numbers for exemptions on Line 4?
Yes. Exemptions must be whole numbers, so three exemptions cannot be split as 1½ and 1½.
Do I file Form 502INJ by itself?
No. You attach it to the front of your Maryland return and write “INJURED SPOUSE” in the upper left corner.
Do I need a new 502INJ for each tax year?
Yes. An injured spouse claim must be submitted for every year you claim to be an injured spouse.
Do I qualify if I had no income or made no tax payments?
No. You must have received income and made payments such as withholding or estimated tax to have a share to protect.
Do I use Form 502INJ to get out of a tax bill I think is my spouse’s fault?
No. That is innocent spouse relief on IRS Form 8857; the 502INJ only protects your share of a refund.
Do I have to file electronically in any case?
Yes. You must e-file if Line 9 shows business tax credits from Form 500CR.
Do I get my refund as a new check from the Comptroller?
No. If the refund was already intercepted, your approved share is issued directly from the intercepting agency.
Do I check the divorced or separated box if I am still married?
No. Check that box only if you are divorced or separated and want the refund issued in your name alone.
Do I have to sign the form even if a preparer filled it out?
Yes. The injured spouse must sign their own block, and a paid preparer must also sign and provide a PTIN.
Do joint interest and investment income get split evenly?
Yes. Income from joint accounts or ventures is divided equally, while individually owned income follows its owner.
Do I need to use a specific ink color?
Yes. You must print the form in blue or black ink only, since other colors can fail the state’s scanners.
Related reading
- How to Fill Out Maryland Form 502 (w/Examples) + FAQs
- How to Fill Out Maryland Form 502B (w/Examples) + FAQs
- How to Fill Out Maryland Form 502CR (w/Examples) + FAQs
- How to Fill Out Maryland Form 502SU (w/Examples) + FAQs
- How to Fill Out Maryland Form 505NR (w/Examples) + FAQs
- How to Fill Out the Maryland List of Debts of Decedent (w/ Examples) + FAQs