CP2000
act on thisRequest for Verification of Unreported Income, Payments and/or Credits
The IRS thinks third parties reported income you did not report, and it is proposing — not assessing — more tax.
60 days if you live outside the United States.
Can it be extended? Yes. The IRS states you may call the number on the notice to ask for more time. How many extra days it grants is not published.
If it passes. A Statutory Notice of Deficiency — a CP3219A — which starts a 90-day Tax Court clock that cannot be extended.
Why you got it
The Automated Underreporter system matched broker and payer forms against your return and found a difference.
What rights it carries
Protest to the Independent Office of Appeals within 30 days. This is not a notice of deficiency, so there is no Tax Court right yet.
Do you have to respond?
Required in practice. The notice says it is not a bill, and also says you must respond.
The mistake people make
Letting the 30 days lapse because it says it is not a bill. Silence turns a negotiable proposal into a deficiency notice, after which the only route that does not require paying first is a Tax Court petition on a deadline nobody can extend.
This is the crypto notice. An exchange reports what you sold for and leaves the cost box blank, so the proposal computes your gain as though every coin cost you nothing. Agreeing to that figure is the second most expensive mistake on this page.
If crypto is why this arrived, the number on it is probably wrong.
Your exchange reports what you sold for and leaves the cost box blank, so any figure the IRS computes from it treats every coin as though it cost you nothing. Rebuild the basis from your own transaction history — free — and see the real number before the deadline above runs out.
Notices that arrive around this one
Letter 525 — The examination is over, here is what the IRS proposes to change, and you have 30 days to protest before it becomes formal. CP3219A — The formal determination that you owe more tax — the ninety-day letter, and your one ticket to Tax Court without paying first. CP11 — The IRS corrected something on your return and now says you owe money. CP12 — The IRS corrected your return and you are owed a refund, or your refund amount changed.Every notice in the library → Not sure it is really from the IRS? →
Sources: IRS — Understanding your CP2000 series notice · IRS Tax Topic 652. Retrieved 2026-08-28. Where the IRS publishes no day count we say so rather than repeat a number we cannot source — the date printed on your own notice is the one that governs. ClearBasis is tax software, not a tax adviser, and this is information rather than advice.