Code 311: tip penalty abatement.
From IRS Document 6209, the IRS's processing codes manual.
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Document 6209 says
Credit. Used on individual (IMF) accounts.
Tip Penalty Abatement
The full Document 6209 entry, as printed
Credit (NPJ) I Tip Penalty Abatement 47, 54 Abates previously posted unreversed TC 310, in whole or in part.
After code 311
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Questions people ask
What does code 311 mean on my IRS transcript?
Document 6209 calls it "Tip Penalty Abatement".
Sources
Checked against these sources on October 30, 2026.