IRS CP23 Notice — Estimated Tax Discrepancy

The IRS says your estimated tax payments don't match what you reported.

A CP23 notice means the IRS found a difference between the estimated tax payments you reported on your return and the payments the IRS actually received. This usually results in a balance due.

Why Did I Get a CP23?

• An estimated tax payment was applied to the wrong tax year
• A payment was made after the tax year ended and was not credited to the correct period
• A check was returned by your bank and was never credited
• You reported estimated payments you did not actually make

What Should I Do?

Compare the payments listed in the CP23 to your own payment records. If the IRS is wrong, gather proof of payment (bank statements, canceled checks) and respond in writing. If the IRS is right, pay the balance due.

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