Code 600: underpayment cleared manually (under $5) manual clearance of underpayment for less than $5.00. input.
From IRS Document 6209, the IRS's processing codes manual.
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This code is rare on refund timelines. The IRS's own description is on the right.
Document 6209 says
Credit. Used on individual (IMF) accounts.
Underpayment Cleared Manually (Under $5) Manual Clearance of underpayment for less than $5.00. Input
The full Document 6209 entry, as printed
Credit (PJ) I/B/ E Underpayment Cleared Manually (Under $5) Manual Clearance of underpayment for less than $5.00. Input only as a part of an account transferred in: see TC 370.
After code 600
Not enough shared timelines with this code yet. The block fills in once 30 people with code 600 share theirs from the result page.
Crowd figures, not IRS data. They describe what happened to others, not a promise.
Questions people ask
What does code 600 mean on my IRS transcript?
Document 6209 calls it "Underpayment Cleared Manually (Under $5) Manual Clearance of underpayment for less than $5.00. Input".
Sources
Checked against these sources on October 30, 2026.