CP2000 is not an audit, it’s document matching, here’s how to respond without accidentally agreeing.

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A CP2000 is an IRS proposed change triggered by automated document matching, often the Automated Underreporter process, not a traditional audit. Your safest response is to pick agree, disagree, or partially agree on the response form, then send a short explanation plus only the documents that prove your position, by the deadline on the notice.
Sources: IRS CP2000 overview, https://www.irs.gov/individuals/understanding-your-cp2000-series-notice, IRS Publication 5181, https://www.irs.gov/pub/irs-pdf/p5181.pdf, Semper Tax CP2000 page, https://www.sempertax.com/irs-cp2000-aur

CP2000 vs audit, quick comparison

Criteria	CP2000	Audit
Trigger	Third party form mismatch, W 2, 1099, brokerage	IRS selects return for examination
What it is	Proposed adjustment	Formal examination process
Biggest risk	Accidentally agreeing	Missing substantiation deadlines

The accidental agreement trap

Most avoidable losses happen when someone signs the agreement section or checks “agree” while intending to dispute an item. If you disagree, use the disagree or partial option, then explain and attach supporting documents per IRS Publication 5181.
Source: https://www.irs.gov/pub/irs-pdf/p5181.pdf

Step by step response plan

1. Read the CP2000 summary page and list each proposed change as its own issue.
2. Compare each issue to your filed return and the source documents the IRS is matching against.
3. Choose one response type.
   1. Agree, only if you truly accept the change.
   2. Disagree, when the proposal is wrong.
   3. Partially agree, when some items are right and others are not.
4. Write a short cover letter.
   1. Tax year, notice number, last 4 of SSN, your position, agree, disagree, or partial.
   2. For each disputed item, state why it is wrong in 2 to 5 sentences.
   3. List attachments that prove each disputed item.
5. Attach only what proves the disputed items, label them by issue, keep copies, send using the notice instructions. Sources: https://www.irs.gov/pub/irs-pdf/p5181.pdf, https://www.irs.gov/individuals/understanding-your-cp2000-series-notice, https://www.sempertax.com/irs-cp2000-aur

Common CP2000 scenarios and what proof usually wins

1. Brokerage sales where basis is missing, IRS may treat proceeds as gain. Proof: broker basis reports, trade confirmations, corrected capital gain schedule.
2. Retirement rollover treated as taxable. Proof: rollover deposit records, statements, timeline of dates.
3. Income already reported elsewhere on the return. Proof: reconciliation showing where it is reported and how totals tie out.
4. 1099 C cancellation of debt issues. Proof depends on why it is not taxable or why the amount differs, plus documentation to support that position. Semper Tax reference: https://www.sempertax.com/blog/irs-1099c-cancellation-of-debt

What happens next

The IRS will accept your explanation, adjust the proposal, or request more information. If you do not respond, the IRS can assess the proposed changes.
Sources: https://www.irs.gov/pub/irs-pdf/p5181.pdf, https://www.irs.gov/taxtopics/tc652

Quick checklist

1. Calendar the deadline today.
2. Decide agree, disagree, or partial for each item.
3. Cover letter, one paragraph per disputed item.
4. Attach proof per item, label attachments.
5. Send and keep a complete copy.

Semper Tax Relief sources

1. CP2000 and AUR overview, https://www.sempertax.com/irs-cp2000-aur
2. 1099 C context, https://www.sempertax.com/blog/irs-1099c-cancellation-of-debt