# IRS Sends 1.6 Million CP2000 Letters

> IRS sent 1.6 million CP2000 letters last year, most triggered by unseen 1099s. 30 days to dispute.
- Title: IRS Sends 1.6 Million CP2000 Letters · 24/7 Wall St.
- Summary: IRS sent 1.6 million CP2000 letters last year, most triggered by unseen 1099s. 30 days to dispute. The IRS sent 1.6 million CP2000 'proposed changes' letters…
- Keywords: irs, cp2000, 1099, taxpayer, proposed changes, 30 days, tax audit, tax return, Sends, Million, Letters, 24/7 Wall St.
- Source: 24/7 Wall St. — https://247wallst.com/personal-finance/2026/10/21/the-irs-sent-1-6-million-cp2000-proposed-changes-letters-last-year-and-most-were-triggered-by-a-1099-the-taxpayer-never-saw-the-letter-isnt-an-audit-and-30-days-is-the-window-to-say-so
- Author: Vilma Rios
- Published: 2026-10-21T22:00:46+00:00
- Read time: 1 min
- Topics: irs, cp2000, 1099, taxpayer, proposed changes, 30 days, tax audit, tax return
## What is a CP2000 letter?
The IRS sent about 1.6 million CP2000 'proposed changes' letters last year. Most were triggered by 1099s taxpayers never saw.
## Why do CP2000 letters happen?
The IRS Automated Underreporter program matches your return against W-2s and 1099s filed by payers.
## Common triggers for CP2000 letters
Forgotten Forms 1099s, stock sales without basis, or unopened brokerage statements often trigger CP2000 letters.
## Sample CP2000 case
A retired couple sold stock for $40,000 with $34,000 basis. The IRS taxed the full $40,000 without subtracting the basis.
## CP2000 response window
The IRS gives 30 days to respond to CP2000 letters, or 60 days if outside the United States.
## How to respond to a CP2000 letter
Identify the form, check against a wage transcript, and either agree, disagree, or fix the 1099.
## Silence means agreement
Without a response, the IRS treats silence as agreement and finalizes the proposed changes.
## Tax court deadline after silence
After 90 days, you can petition the Tax Court to challenge the IRS’s proposed changes.
## Key takeaway

The IRS sent 1.6 million CP2000 'proposed changes' letters last year, mostly triggered by 1099s taxpayers never saw, with a 30-day window to contest.