Reference code 9023.
Math error on return. Refund paper check mailed more than 4 w...
Math error corrected
See how long people with this situation waited, from their transcripts.
Check my refundYour transcript is read in your browser.
What it means.
The IRS manual's wording:
Math error on return. Refund paper check mailed more than 4 weeks ago
What to do.
A corrected refund was mailed over 4 weeks ago; the notice explains the change.
Questions people ask
What does reference code 9023 mean?
The IRS changed an amount on the return. The IRS manual's own wording is quoted on this page.
What should I do about code 9023?
A corrected refund was mailed over 4 weeks ago; the notice explains the change.
Sources
Checked against these sources on October 30, 2026.