IRS · United States

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Form 8379: Injured Spouse Allocation

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Quick answer

IRS Form 8379, Injured Spouse Allocation, lets one spouse on a joint return recover their share of a refund the IRS applied to the other spouse's past-due debt — child support, student loans, or back taxes. File it with the joint return or by itself. JustFill fills the official 8379 PDF online: AI detects every field, and you download the finished form free.

Form
Form 8379
Issued by
IRS
Country
United States
Cost to fill
Free

What is Form 8379?

IRS Form 8379, Injured Spouse Allocation, is how you get back your share of a joint tax refund the IRS applied to your spouse's separate past-due debt — back federal or state taxes, child or spousal support, or a federal nontax debt such as a defaulted student loan. JustFill makes the official PDF fillable in your browser — no printing, scanning, or installs. The two-page form has four parts: Part I screens whether you qualify as an injured spouse with yes/no questions, Part II records the joint return details, Part III splits income, deductions, credits, withholding, and payments between the two of you so the IRS can compute your share, and Part IV holds the signature when you file the form on its own. You can attach it to your joint return before an offset happens or file it by itself after the IRS keeps your refund.

Who fills out Form 8379?

  • Spouses whose joint refund was offset for the other spouse's past-due child or spousal support
  • Taxpayers whose refund was taken for a spouse's defaulted federal student loan or other federal nontax debt
  • Spouses whose joint overpayment was applied to the other spouse's separate federal or state tax debt
  • Filers who expect an offset and attach Form 8379 to their joint return up front
  • Couples in community property states, where the IRS divides the refund under state law

Field-by-field breakdown

What each section of Form 8379 asks for. JustFill’s AI will detect these fields automatically when you upload the PDF — review the breakdown below so you know what to enter.

Part I (Lines 1–9) — Should you file this form?

Yes/no screener: the tax year, whether you filed jointly, whether the joint overpayment went to your spouse's separate past-due debt, whether you are legally obligated on that debt, community property residence, and your own payments, earned income, and credits.

Line 10 — Names and SSNs

Both spouses exactly as shown on the joint return, in the same order, with a checkbox marking who is the injured spouse.

Line 11 — Refund in both names

Check only if you want the refund issued in both names; otherwise the IRS issues separate refunds where applicable.

Line 12 — Different mailing address

Yes/no plus an address if you want the injured spouse refund mailed somewhere other than the address on the joint return.

Lines 13a–13b — Income

W-2 wages and all other income, split across three columns: amount on the joint return, allocated to the injured spouse, allocated to the other spouse.

Lines 14–17 — Adjustments, deductions, and credits

Adjustments to income, standard or itemized deductions, nonrefundable credits, and refundable credits (excluding any earned income credit), each allocated between spouses.

Lines 18–20 — Taxes and payments

Other taxes, federal income tax withheld, and estimated or other payments, allocated the same way.

Part IV — Signature

Sign and date only when filing Form 8379 by itself; skip this part when the form is attached to your tax return.

Common mistakes to avoid

  • 1Filing Form 8379 when you actually need innocent spouse relief — that is Form 8857, a different request for a different problem.
  • 2Listing spouses in a different order than on the joint return — Line 10 must match the return exactly, with the injured spouse box checked.
  • 3Filing the form by itself without attaching both spouses' Forms W-2 and W-2G and any 1099s showing federal withholding — the IRS needs them to verify the allocation.
  • 4Part III columns that don't add up — on every line, column (a) must equal columns (b) plus (c).
  • 5Assuming one filing covers future years — you must file a new Form 8379 for each year your refund is offset.

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Related forms

Internal Revenue Service (IRS), U.S. Department of the Treasury

Form 1040

Form 1040, U.S. Individual Income Tax Return

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Form 1040-X

Form 1040-X, Amended U.S. Individual Income Tax Return

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Form 8332

Form 8332: Release/Revocation of Release of Claim to Exemption for Child by Custodial Parent

Frequently asked questions

File Form 8379 (injured spouse) when your share of a joint refund was taken for your spouse's separate past-due debt, such as child support or a student loan. File Form 8857 (innocent spouse relief) when you want relief from tax your spouse understated on the return itself.
The IRS estimates about 14 weeks when the form is filed with a paper joint return (about 11 weeks if the return is e-filed) and about 8 weeks when filed by itself after the joint return has processed. Check irs.gov for current timeframes.
Mail it to the same IRS Service Center where you filed the original joint return — or, if you e-filed that return, the center for the area where you live. Attach copies of both spouses' Forms W-2 and W-2G and any 1099s showing federal income tax withholding, and sign Part IV.
Generally you must file within 3 years from the due date of the original return (including extensions) or within 2 years from the date you paid the tax that was later offset, whichever is later. Exceptions exist — see the IRS instructions.
Yes. Tax software can e-file it with your joint return, and the IRS also accepts it attached electronically to Form 1040-X, even if you are not otherwise amending. You can still print and mail it by itself after an offset.
Download the current Form 8379 PDF free from the IRS at irs.gov/forms-pubs/about-form-8379, then upload it into JustFill to complete it online without printing.

Official source: Form 8379 on IRS’s website

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