If you ignore a CP2000, the IRS finalizes its proposed changes — the extra tax, interest, and penalties become a bill you legally owe, even if their numbers were wrong.
A CP2000 is not a bill and not an audit — it’s a proposal, sent when income reported to the IRS doesn’t match your return. It gives you a deadline (usually 30 days) to agree, partially agree, or dispute. Ignore it and the IRS issues a Notice of Deficiency, then finalizes the assessment. At that point the proposed tax becomes real debt, collection can begin, and your options narrow sharply. Responding — even to say you partly disagree — keeps every door open.
No. A CP2000 is an automated under-reporter notice proposing changes based on a document mismatch. It is not a formal audit, though ignoring it can lead to a formal assessment.
The notice typically gives 30 days from the date on the notice. The exact deadline is printed on the first page and controls your options.
Yes. You can agree, partially agree, or fully dispute. Responding to dispute the incorrect portions with documentation is common and effective.
Upload the actual document and Main AI reads every clause, flags the risks, extracts the deadlines, and cites the law — free to start, no signup to see your first analysis.
Run the IRS Notice Analyzer — free →