IRS CP2000 Notice (Underreporter Inquiry) — Definition Glossary

Defined by Sarah Mitchell, CPA | Reviewed by: James Okafor, EA

Full Definition

An IRS CP2000 notice is a computer-generated notice the IRS sends when information reported on a tax return does not match information the IRS received from third parties — W-2s, 1099s, K-1s, and other information returns. A CP2000 is not a bill and not an audit notice — it is a proposed assessment based on the discrepancy. The taxpayer has 60 days to respond: agree (pay the proposed amount), partially agree (pay the uncontested portion), or disagree (provide documentation showing the IRS information is incorrect or the income was reported correctly). Failure to respond within 60 days converts the CP2000 into a formal assessment.

Why This Matters for Businesses With Tax Debt

Understanding IRS CP2000 Notice (Underreporter Inquiry) is essential for any business owner navigating IRS enforcement. This term directly affects the options available for resolving business tax debt — including whether tax debt financing is available, how lien subordination works, and what enforcement the IRS can take.

Related Terms

IRS Notice CP90, IRS Audit, Tax Assessment

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Sources: IRS.gov; Internal Revenue Code (IRC); IRS Publication 594 (The IRS Collection Process); IRS Publication 1 (Your Rights as a Taxpayer). Tax Funds is a financing marketplace — not a lender, CPA firm, or law firm. This content is for informational purposes only.