CP2000 Notice.
In plain English
A CP2000 notice is an automated IRS letter sent when the income or payments on your return do not match the W-2s, 1099s, and other forms third parties reported to the IRS. It is not a bill and not a formal audit. It proposes a change to your tax based on the mismatch and asks you to agree or explain. You respond by the date on the notice, either agreeing and paying, or sending records that show why your original return was right. The notice includes a response form for both choices.
01Why it matters
Ignoring a CP2000 turns a proposed change into an actual assessment plus interest, while a quick response correcting an honest mismatch can shrink or erase what the notice says you owe.
02The math, step by step
You forgot to report $1,100 of interest from a savings account that the bank reported on a 1099-INT. The IRS sends a CP2000 proposing extra tax on that $1,100. You agree, sign the response form, and pay the small balance, which avoids further interest from piling up.
03What this is NOT
A CP2000 is a proposed change, not a final bill and not an audit. You have the right to disagree and send proof. It only becomes an amount you owe if you agree or do not respond by the deadline.
04Receipts
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Plain-English answers from our glossary. Receipts included. Never advice.
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