Prior-year returns
Prior year tax return checklist
A client who did not file for one or more years often does not have the documents anymore. The firm can rebuild the return from IRS transcripts, bank records and copies from employers and payers, but it needs a clear picture of the years involved first. This checklist covers what to collect before preparing a prior-year federal or state return.
Who sends itSent by the tax preparer to a client who needs one or more prior-year returns filed, or whose records are incomplete after a move, a job change or a lapse in filing.
0 of 26 ticked
01Years and filing status
02Identity and prior filings
03Income records
04Deductions and credits
05Filing and payment options
What firms get wrong
- Preparing the oldest missing return first instead of the most recent one, which makes the carryovers harder to follow.
- Skipping the IRS transcript and relying on the client's memory for the income documents.
- Missing the refund statute date, so a year that could have produced a refund is filed too late.
- Filing a prior-year return without checking the state requirement for each year the client lived or worked there.
- Promising a payment plan before the IRS has reviewed the balance and the client's ability to pay.
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Questions about this checklist
How many prior years should a client file?
At least the years the IRS or state is asking about, and the years that can still produce a refund. A client who has not filed for several years should start with the most recent missing year and work backward.
What if the client has no records?
Start with the IRS wage and income transcript, which shows the W-2s, 1099s and other documents reported under the client's Social Security number. Bank statements, employer copies and state records can fill the gaps.
Can the IRS prepare a return for the client?
The IRS may prepare a substitute return if the client does not file, but it does not claim every deduction or credit the client may be entitled to. A return prepared by the firm is usually better.
Will the client owe penalties for filing late?
A failure-to-file penalty and a failure-to-pay penalty may apply. The firm should calculate the exposure and discuss whether a reasonable-cause request or an installment agreement fits.
How long does the client have to claim a refund?
A refund claim generally must be filed within three years from the original due date or two years from the date the tax was paid, whichever is later. After that date, the refund may be lost even if the return is correct.
Sources
Checked November 3, 2026. Tax rules, forms and thresholds change; confirm them with the IRS or your tax software before relying on them.
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