Code 337: abatement of interest assessed on additional tax or deficiency.
From IRS Document 6209, the IRS's processing codes manual.
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Document 6209 says
Credit. Used on individual (IMF) accounts.
Abatement of Interest Assessed on Additional Tax or Deficiency
The full Document 6209 entry, as printed
Credit (NPJ) I/B Abatement of Interest Assessed on Additional Tax or Deficiency Generated Transaction Abates previously posted 190, 196 or 336 interest assessment in whole or in part. Computer-generated when an Examination Adjustment TC 301 posts.
After code 337
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Questions people ask
What does code 337 mean on my IRS transcript?
Document 6209 calls it "Abatement of Interest Assessed on Additional Tax or Deficiency".
Sources
Checked against these sources on October 30, 2026.