CP2006
informationalCP2006 notice
A receipt. The IRS has your correspondence and will tell you what it decides.
No deadline of its own.
If it passes. Nothing. It is an acknowledgement, not a step.
Why you got it
You sent something — usually a reply to a CP2000 or CP2501 — and this acknowledges it.
What rights it carries
None conferred. The page warns in terms that it extends nothing: if a deficiency notice is outstanding, the 90 days keeps running.
Do you have to respond?
Optional. You do not have to answer it.
The mistake people make
Reading 'we received your information' as 'the clock stopped'. It did not. People spend the 90 days negotiating, get this letter, and find on day 95 that the only remedy that mattered has expired.
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
CP5071 — A Form 1040 was filed under your number and the IRS wants to know whether it was you before it processes the return. Letter 4883C — The same identity verification as the CP5071 series, with one operative difference: this one has no online path at all.Every notice in the library → Not sure it is really from the IRS? →
Sources: IRS — Understanding your CP2006 notice. 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.