CP2000 Notice for Crypto: What to Do in the First 30 Days

A CP2000 notice — the IRS’s automated underreporter notice — lands in your mailbox because the Service received a 1099 that does not match what you filed. For crypto taxpayers, this almost always means a 1099-K or 1099-B from an exchange. Here is exactly what to do in the first 30 days.

What Triggers a CP2000 for Crypto?

The IRS Automated Underreporter (AUR) program cross-references every 1099 filed with the income reported on the corresponding Form 1040. When an exchange submits a 1099-K showing $200,000 in gross proceeds and your Schedule D shows nothing — or $80,000 — the system flags a discrepancy and generates a CP2000.

Common crypto-specific triggers include:

• 1099-K from Coinbase, Kraken, or Gemini showing gross proceeds without offsetting cost basis. The IRS treats the full proceeds as income unless you respond with basis documentation.
• 1099-B or 1099-DA with incorrect basis that causes your Schedule D gain to be understated versus what the broker reported.
• Staking and lending income on a 1099-MISC that you omitted from Schedule 1 or Schedule C.
• Prior-year Coinbase 1099-K summons data — the IRS received data on accounts with more than $20,000 in transactions as far back as 2017.

“A CP2000 is a proposed — not a final — assessment. You have the right to agree, partially agree, or disagree. Most crypto CP2000s overstate the tax because they use gross proceeds as income. Always respond.”

— Saim Akif, CPA

How to Read the Notice

The CP2000 arrives as a multi-page document. Page 1 shows the proposed additional tax, penalties, and interest. Pages 2–3 break down the discrepancies line by line: the income the IRS received on information returns vs. what you reported. The last pages are the response form and payment stub.

Read the discrepancy table carefully. In crypto cases, the IRS often shows: “We received 1099-K income of $X; you reported $Y; proposed additional income = $X minus $Y.” This framing treats all proceeds as income, ignoring your cost basis. Your response needs to demonstrate that proceeds minus basis equals actual gain — which may be far less than the proposed amount, or even a loss.

Your Three Response Options

• Agree: You sign the response form and pay. Use this only if the IRS’s calculation is correct, which is rare in crypto cases.
• Partially agree: You acknowledge some additional income but dispute the full amount. You send a revised Schedule D with corrected basis and explain the difference in a cover letter.
• Disagree: You provide documentation showing no additional tax is owed. This is the most common response for crypto taxpayers who filed correctly but whose exchange issued an inflated 1099.

Evidence to Gather Before You Respond

A strong CP2000 response package for crypto typically includes:

• Transaction-level export from every exchange referenced in the notice
• Wallet addresses and on-chain history for any external transfers
• Cost basis calculation for every lot sold in the tax year at issue
• Revised Form 8949 and Schedule D showing correct gain/loss
• Copy of the 1099-K or 1099-B you received (compare to what the IRS says it received)
• Any prior correspondence with the exchange about 1099 errors

If you used a tax software that generated Form 8949 from exchange CSVs, include that report as a reconciliation exhibit. The IRS AUR team responds well to organized, labeled submissions. For complex cases involving multiple exchanges, Saim builds a transaction-level subledger that ties directly to each 8949 line — see our Audit Defense service.

Deadline Math: Do Not Miss the 60-Day Window

The CP2000 gives you 60 days from the notice date (not the date you received it) to respond. If you miss the deadline, the IRS issues a Notice of Deficiency (CP3219A) — you then have 90 days to petition Tax Court or pay and sue in District Court. That is significantly more expensive and time-consuming. Calendar the response deadline the day the notice arrives.

If you need more time, you can request a 30-day extension by calling the number on the notice or faxing a written request. Extensions are routinely granted once but not twice.

When to Bring In a CPA

Immediately. A CP2000 involving crypto is not a DIY project. The basis documentation requirements, the Form 8949 adjustment codes, and the cover letter framing all require expertise to get right. Filing an incorrect response can lock in the wrong tax liability or trigger a full examination. See our Audit Defense page for how Saim structures CP2000 engagements, including our flat-fee response package.

Need Help?

Received a CP2000? Do not wait. The 60-day clock is running. Saim Akif, CPA handles crypto underreporter responses every week and has a structured process for building the evidence package. Schedule a 30-minute intake with Saim.