Note:
Internal Revenue Manual Part 5. Collecting Process · 2026-10-03 edition · updated 2026-10-04 · United States
Advise the taxpayer that if future W-2 forms and TIN's do not match, they may be locked in again.
If the taxpayer has a valid SSN and filed the most current return due but has a balance due under a valid ITIN
Follow general procedures
Determine withholding status (S, M, HOH)
Compute withholding rate
Issue modification letters as appropriate
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