How to File Back Taxes: A Step-by-Step Guide
Last reviewed by Calculus Tax in-house Settlement Officer
Filing back taxes is mostly a records problem: find out which years are missing, get the income information the IRS already has, and prepare each year's return on that year's forms. File even if you cannot pay, then deal with the balance through a payment plan and ask about penalty relief.
Quick answer
To file back taxes, check which years the IRS shows as unfiled in your IRS Online Account, then get wage and income transcripts for those years. Prepare each return on that year's forms and file it like an on-time return, or to the address on any IRS notice. File even if you can't pay, then set up a payment plan.
| Account and wage and income transcripts | Current and nine prior years in your IRS Online Account |
|---|---|
| Verification of non-filing letter | Anytime for the prior three years; Form 4506-T for older years |
| Older or missing records | Form 4506-T, line 8 |
| Prior-year forms | IRS.gov or 800-TAX-FORM (800-829-3676) |
| Where to file | Same as an on-time return, or the address on an IRS notice |
| Processing time | About 6 weeks for an accurate past-due return |
Step 1: Find Out Which Years Are Missing
Sign in to your IRS Online Account and review your tax account transcripts, which are generally available there for the current and nine prior years. A verification of non-filing letter confirms the IRS has no processed return for a year, and is available anytime for the prior three years. The IRS normally expects the last six years; see how far back the IRS goes.
Step 2: Get Your Income Records From the IRS
Wage and income transcripts show W-2, 1098, 1099, and 5498 information that payers sent to the IRS, for the current and nine prior years. Download them in your Online Account, or file Form 4506-T and check the box on line 8. The transcript only shows documents filed with the IRS, so also contact employers and payers for anything missing.
Step 3: Use the Correct Year's Forms
Each return must be prepared on the forms and instructions for that tax year. Download prior-year forms from IRS.gov or order them at 800-TAX-FORM (800-829-3676). Prior-year rules, credits, and standard deductions differ, so do not use the current year's form for an old year.
Step 4: File Each Return the Right Way
File a past-due return the same way and to the same location as an on-time return. If you received an IRS notice about that year, send the return to the address on the notice. The IRS says it takes approximately 6 weeks to process an accurately completed past-due return.
Step 5: Handle Any Substitute Returns
If the IRS already prepared a substitute for return, still file your own return so you get your deductions and credits; the IRS will generally adjust your account. If you received a CP3219N, file within the 90-day window or petition the Tax Court. If the IRS listed income that is wrong, call 866-681-4271 and get corrected forms from the payer.
Step 6: Pay or Set Up a Payment Plan
File every return whether or not you can pay. Pay what you can, then choose an option: a short-term plan of up to 180 days, or an installment agreement, which individuals who owe $50,000 or less and have filed all returns can set up online. Compare them in IRS payment plan options.
Step 7: Ask About Penalty Relief
Once returns are filed, ask whether First Time Abate, reasonable cause, or another form of penalty relief applies. Interest on penalties that are removed is reduced or removed too.
Getting Help Filing Back Taxes
The IRS's Volunteer Income Tax Assistance (VITA) and Tax Counseling for the Elderly (TCE) programs offer free help to qualifying taxpayers. For multiple years or a balance due, Calculus Tax pulls your transcripts, analyzes them with Brevitax, prepares the returns, and has our in-house Settlement Officer review the resolution plan. Contact us.
Frequently Asked Questions
Do I need my old W-2s and 1099s to file back taxes?
Not necessarily. IRS wage and income transcripts show the W-2s and 1099s filed with the IRS for the current and nine prior years. Contact employers and payers for anything not shown.
Where do I mail back tax returns?
To the same location you would file an on-time return for that year, or to the address on any IRS notice you received about that year.
Can I still get a refund on old returns?
Only if you file within three years of the return's due date. Older refunds are generally lost.
What if I cannot pay what I owe when I file?
File anyway. Then request a short-term plan or an installment agreement, or ask about hardship options if you cannot pay.
How long does the IRS take to process a past-due return?
Approximately 6 weeks for an accurately completed return, according to the IRS.
Can I get free help filing back taxes?
Possibly. The IRS's VITA and TCE programs offer free tax preparation to qualifying taxpayers.
Sources
What can change the answer
Notice type, issue date, filing history, account status, deadlines, and current agency procedures can change the available next step. Bring the complete notice and account records to a qualified review.
Tax rules and collection procedures can change and depend on the account. Federal claims should be checked against current IRS guidance; California claims should be checked against the California Franchise Tax Board. See our editorial methodology for sourcing and update standards.
Results depend on your facts and on IRS or state decisions. Calculus Tax, Inc. is not affiliated with the IRS or any government agency.
When professional help may make sense
Calculus Tax, Inc. can review notices, organize financial information, explain available paths, and communicate with the IRS or California agencies when representation is appropriate. The right next step depends on your facts, deadlines, filing history, and ability to pay.
We are based in Burbank and serve clients in Burbank and throughout Los Angeles County. See our local service-area pages for location-specific information.
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