Reference code 1581.
Manual refund freeze with no TC 150
Return under review
See how long people with this situation waited, from their transcripts.
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What it means.
The IRS manual's wording:
Manual refund freeze with no TC 150, or, return is Coded CCC "O" and TC 150 posted without TC 840
What to do.
A manual refund is being handled. No action unless a letter asks.
Codes in the same group.
Questions people ask
What does reference code 1581 mean?
The return is under review and the refund waits. The IRS manual's own wording is quoted on this page.
What should I do about code 1581?
A manual refund is being handled. No action unless a letter asks.
Sources
Checked against these sources on October 30, 2026.