high urgencytypical response window: 30 days
IRS Notice CP2000: Proposed Changes to Your Return
What it means
Income reported by third parties doesn't match your return. Not an audit — a mismatch proposal.
What to do
Agree, partially agree, or dispute with documentation. Don't ignore it.
Verify it's real. The IRS contacts you by mail first — never by phone, email, or text demanding payment. The notice includes a number in the top-right corner and instructions on irs.gov. When in doubt, log into your IRS online account rather than calling a number on the letter.
FAQ
What is IRS notice CP2000?
Income reported by third parties doesn't match your return. Not an audit — a mismatch proposal.
How long do I have to respond to CP2000?
You typically have 30 days from the notice date. The deadline is printed on the notice itself — use that, not this estimate.
Should I get professional help for CP2000?
Yes — notices at this stage of the collection process are where an EA, CPA, or tax attorney can prevent enforcement and negotiate terms. Most offer a free consultation.