Form 637: Application for Registration (For Certain Excise Tax Activities)
- Product number
- Form 637
- Title
- Application for Registration (For Certain Excise Tax Activities)
- Type
- Forms
- Issuing body
- Internal Revenue Service (irs.gov)
- Revision (per IRS index)
- Dec 2025
The number, title, and revision date above are reproduced verbatim from the
official IRS
index (captured July 2026). Newer revisions may exist — check irs.gov. This page adds
no instructions or commentary. Not tax or legal advice.