Note:
Internal Revenue Manual Part 21. Customer Account Services · 2026-10-03 edition · updated 2026-10-04 · United States
You will also need to include the TIA information on the second name line with Attn. or c/o (in care of). Be sure to enter the TIA address in the applicant's address field.
- TIA information is not found
Decline the application and return it to the requestor.
See the Status Code Charts below for a list of the Pre-IDRS Status codes, an explanation and abbreviated correction guidelines. See the instructions for your specific applicant for more correction procedures.
Code
Explanation
Corrective Action
600
Ready for IDRS research
None required, override if manual verification performed.
601
Sent for IDRS research
None required, override if manual verification performed.
605
Applicant entity not valid
Verify taxpayer entity, the Name, the TIN and the Form 8802. Correct or correspond using Letter 4064.
608
Possible Foreign Entity
Verify taxpayer residency, using Form 8802 and IDRS. If research indicates U.S. resident for the Certification year, override.
609
Manual verification needed on TIA
Research for TIA on Form 8802, Form 8821, Form 2848, or IDRS. If found, enter TIA information and override. If not located, issue letter 3427.
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