Filing prior-year tax returns: catching up on past-due years

Missed a year or two? Filing now stops penalties from growing, keeps refunds from expiring and protects your Social Security record. Here is what to know before you catch up.

By Your Best Editorial Team Updated October 2026

General information, not tax advice. Based on IRS forms, instructions and guidance linked below. Your situation may differ.

Why file now

  • Refunds expire. If tax was withheld from your pay, you may be owed money, but only if you file within 3 years of the due date. For the 2027 season, 2023 is the oldest year still open, until April 15, 2027.
  • Penalties grow. Late filing costs 5% of the unpaid tax for each month, up to 25%; late payment adds 0.5% a month, up to 25%, plus interest. For a return due in 2027 that is more than 60 days late, the minimum is $535 or the full tax due, whichever is less. Both penalties are a percentage of unpaid tax, so a return that is owed a refund has none.
  • Social Security credits. Self-employment income that is never reported does not count toward Social Security retirement or disability benefits.
  • Loans and aid. Mortgage lenders, business lenders and college financial aid ask for filed returns.
  • Your refunds now. The IRS can hold a current refund until past-due returns are filed.

If you do not file

The IRS can prepare a substitute return from the W-2s and 1099s it has, usually without the deductions and credits you could claim. It then sends a 90-day Notice of Deficiency (CP3219N). An unpaid balance leads to collection: liens, and levies on wages or bank accounts.

How to catch up

  1. Pull your wage and income transcripts for each missing year from Get Transcript.
  2. Collect anything not on the transcript: self-employment income and expenses, deductions, dependents.
  3. Prepare each year on that year's forms. Start with the years that are owed refunds before they expire, and any year the IRS has written about.
  4. File each return where an on-time return would go, or to the address on the IRS notice.
  5. If you owe, pay what you can and ask about a payment plan.

Doing it yourself: Past-year returns must be prepared on that year's forms. Most software companies sell prior-year versions, and IRS.gov has prior-year forms and instructions; your IRS wage and income transcript shows the forms reported for that year.

Stuck? Try the free options first: the IRS Interactive Tax Assistant, your software’s help center and IRS-certified volunteers. See where to get help.

Last resort: our review my return before i file is $79. You still file it yourself.

Frequently asked questions

Can I still get a refund for an old year?

Yes, if you file within 3 years of that return's due date. During the 2027 filing season, the oldest year still open is 2023, until April 15, 2027. After that, the refund is lost for good. The same deadline applies to refundable credits like the earned income credit.

What if I owe and cannot pay?

File anyway: the late-filing penalty is far larger than the late-payment penalty. Then pay what you can and ask the IRS for more time or a payment plan.

Will the IRS hold my current refund?

It can. The IRS holds refunds when its records show one or more returns are past due, until it gets them or an acceptable reason for not filing.

The IRS already filed a return for me. Do I still file?

Yes. A substitute return the IRS prepares may not include deductions and credits you are entitled to. You get a 90-day Notice of Deficiency (CP3219N) to file your own return or petition the Tax Court; the IRS generally adjusts your account to your return.

I lost my W-2s and 1099s. What can I do?

Get a wage and income transcript from your IRS online account (Get Transcript) or with Form 4506-T. It lists the W-2s, 1099s and other forms reported to the IRS for that year. You can also ask the employer or payer for a copy.

How long does a past-due return take to process?

About 6 weeks for an accurate return, per the IRS.

Do I file old years on old forms?

Yes. Each year is filed on that year's forms with that year's rules and figures, not 2026's. If you got an IRS notice, send the return to the address on the notice.

Official sources

Related guides

Tax deadlines · Tax refund calculator · FAQ