Identity, refunds & unfiled returns

CP2566 notice — serious

A proposed assessment from a substitute for return: since no return arrived, the IRS computed your tax from W-2s and 1099s — and is proposing that figure, usually with penalties.

Serious

What this letter is

A proposed assessment from a substitute for return: since no return arrived, the IRS computed your tax from W-2s and 1099s — and is proposing that figure, usually with penalties.

Why you got it: The nonfiler sequence ran its course without a return from you.

What it is not

Not final yet: it's a proposal you can replace. The IRS's version almost always overstates the tax — no business expenses, no basis, no credits, worst-rate filing status.

Your first move: File your own return for that year. A real return — with your deductions and correct status — supersedes their computation. Alternatively, sign their agreement form only if their number is actually right (rare).

Your deadline, counted

Every clock runs from this date — not from the day the letter reached you.

Your options, in the order most people should try them

1. File your return

The fix, full stop — especially with business income, where their gross-receipts figure ignores every expense.

2. Audit reconsideration (if already assessed)

Ask the IRS to reopen the SFR with your return and documents.

Your rights on this letter

  • File the true return — before OR after assessment; SFR reconsideration exists for assessed cases.
  • Deficiency-stage Tax Court rights if the IRS formalizes the proposal.

How to respond

Return or response to the address on the notice; certified mail for a filed return.

Scam check

SFR cases attract 'we'll fix your tax problem' cold calls. The fix is a tax return — filed by you or your preparer, not a call center.

If you ignore it

The IRS's overstated figure becomes your assessed balance, and collection starts on money you likely don't owe at that size.

Where this sits on the ladder: CP3219A → CP14 →

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Sources, checked 2026-10-19:
  • IRS — CP2566 notice
  • 26 U.S.C. 6020(b)