A CP2000 notice flags a mismatch between what you reported on your tax return and what third parties (employers, banks, payment processors) reported to the IRS.
What Triggered This Notice
Per IRS.gov: “The income or payment information we received from third parties, such as employers or financial institutions, doesn’t match what you reported on your tax return.”
What It Means
Per IRS.gov, the notice “isn’t a bill and your response may be required.” It proposes adjustments based on the third-party documents and shows what your tax, penalty, and interest would be if the IRS figures are correct.
Your Deadline
Respond by the date listed on your specific notice.
What Happens If You Miss It
Per IRS.gov: “If you don’t reply or we can’t resolve the discrepancy, we may send another notice and a bill.” Unresolved CP2000 balances can escalate through the same reminder sequence as any other tax debt — see CP501.
What To Do
Respond using the IRS document upload tool, fax, or mail — either agreeing, partially agreeing, or disputing with supporting documentation. The notice series includes CP2000, CP2000A, CP2000B, CP2000C, CP2000D, and CP2000E variants depending on your specific situation.
Source: IRS.gov — Understanding Your CP2000 Notice
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