What the IRS says: “The estimated payments on IRS records differ from your return, producing a changed (usually increased) refund or overpayment.” Here’s what it actually means, your deadline, and exactly how to respond.
The good-news twin of CP23: the IRS found more payments credited to you than you claimed (or corrected in your favor). Verify anyway — if the 'extra' payment wasn't actually yours (a misapplied deposit), spending it invites a later clawback with interest.
Notice family: Return Adjustments — The IRS changed something on your return — math corrections, credit adjustments, payment mismatches. Often correct, frequently not. You typically have 60 days to dispute a change you disagree with.
Reconcile the payment list against your records
Legitimately yours: accept, refund arrives in 4-6 weeks
Not your payment: respond and say so before the eventual reversal surprises you
Adjust next year's estimates if the ledger revealed tracking gaps
Response needed only when the credited payment isn't yours or the recomputation looks wrong — short letter, payment list, proof.
The estimated payments on IRS records differ from your return, producing a changed (usually increased) refund or overpayment. In practice: The good-news twin of CP23: the IRS found more payments credited to you than you claimed (or corrected in your favor). Verify anyway — if the 'extra' payment wasn't actually yours (a misapplied deposit), spending it invites a later clawback with interest.
There is no fixed response deadline on this notice, but acting promptly keeps your options open. The respond-by date printed on your own notice always controls.
Response needed only when the credited payment isn't yours or the recomputation looks wrong — short letter, payment list, proof.