IRS code 660: Estimated tax payment
Quick answerA quarterly estimated tax payment (Form 1040-ES or an online payment designated as estimated tax) was credited to the year shown.
Transcript code660
MeaningEstimated tax payment
Action needed?Yes — see steps
What happens next
Each payment posts separately with its date.
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What you should do
- Make sure every estimated payment appears — missing ones cause CP23 notices
- Claim the total on your return
Frequently asked questions
What does IRS code 660 mean?
A quarterly estimated tax payment (Form 1040-ES or an online payment designated as estimated tax) was credited to the year shown.
What should I do?
Make sure every estimated payment appears — missing ones cause CP23 notices Claim the total on your return
How long does it take?
Each payment posts separately with its date.
Sources
- IRS: Understanding your IRS notice or letter
- IRS: Get Transcript
- Taxpayer Advocate Service (independent help inside the IRS)
Written by the editorial team and checked against the official sources above. See our editorial policy.
By the TranscriptCodes Editorial Team · Last reviewed 2026-11-12.