Exception:
Internal Revenue Manual Part 21. Customer Account Services · 2026-10-03 edition · updated 2026-10-04 · United States
When the tax period being researched is not present on Form 8802, Form 8821, Form 2848, or IDRS, but the certification year is, issue certifications if all other requirements are met.
611/612
No record of this POA/TIA (6166 only)
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.
615
Tax form type missing
Verify type of tax form. If information found, enter. If not found, correspond unless the application is from applicant. If application is from applicant, then research.
616
Invalid TIN and Tax Form combination
Verify TIN and Tax Form, from application; correct, if needed. If unable to locate correct information, research IDRS if applicant is the requestor; otherwise, correspond.
617
Form 5500 and no plan number
Enter plan number from Form 8802. If unable to locate plan number, research IDRS if applicant is the requestor; otherwise, correspond.
620
Tax Year blank or invalid
Verify and correct tax year according to Form 8802 application. If not found, correspond using letter 4064.
621
Applicant may not be required to file (does not go to IDRS)
Verify applicant's filing requirement, using Form 8802 and IDRS. If no filing requirement - Override.
625
One or more data fields are invalid
Verify data input on Form 6166 input screen.
626
Certified year must equal tax period field, current year, or prior year
Verify, then correct, override, or correspond.
630
Multiple errors
Compare information entered with Form 8802, then correct.
633
Paragraph code does not exist
Verify that you have selected all the correct boxes, entity type, tax form filed, etc.
635
QSSS Verified box not checked
Verify via attachments to Form 8802 or IDRS that the entity is an approved Q-Sub. If unable to verify Q-Sub, correspond.
640
No record of POP but one required
Verify, using Form 8802 that POP is required. If required and on the form, correct, if needed. If not on form, correspond.
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