Catalogue — REF A-1…E-2
- A-1 — EIN basics for non-residents
- A-2 — EIN vs. ITIN vs. SSN — the three numbers
- B-1 — Responsible-party rules
- B-2 — Application routes, compared
- B-3 — Form SS-4, annotated line by line
- B-4 — Reference numbers 101 and 102
- B-5 — When the responsible party changes
- C-1 — Lost CP 575 & the Letter 147C replacement
- C-2 — Wrong name or address on the CP 575
- C-3 — Closing an EIN — the IRS never cancels one
- D-1 — Form 5472 + pro-forma Form 1120
- D-2 — State tax IDs are not EINs
- E-1 — TIN matching and name control
- E-2 — How a bank verifies an EIN
- The Catalogue
- Find Your Answer
- Reference Desk
- Checklist Review
- Errata & Changes
- Enquiries (FAQ)
- Imprint & Method
- Contact — Request Slip
Write to the desk
Corrections are the most valuable mail a library receives. If an entry is wrong, stale, or reads as though we file things — write. The desk also takes founding-list questions and checklist-review enquiries here.
§ 1 —What to write about, and what not to
Corrections and staleness reports — the entry's title and the source that contradicts it. These are worked first.
Founding list and Reference Desk questions — what the tier includes, the founding-list state, the checklist reviews.
Not this desk: requests to file an EIN, prepare a return, or advise on your facts. The desk will answer with the relevant library entry and the name of the professional the question belongs to — that is a routing, not a brush-off.
The desk's mailbox opens under its own company's name when EIN For Non-Residents LLC is formed; until then, messages are taken through this form and the founding-list channel, and the founding list is written to first when the mailbox opens. No address is published here that is not yet a working mailbox — a library that invents its own contact details has told you how to read the rest of its pages.
§ 2 —The Request Slip
§ 3 —The IRS's own contact points (live today)
| For | Contact point | Hours |
|---|---|---|
| EIN applications, international | 267-941-1099 (not toll-free) | Mon–Fri, 6 a.m.–11 p.m. Eastern |
| Existing EINs and Letter 147C | Business & Specialty Tax Line, 800-829-4933 | Mon–Fri, 7 a.m.–7 p.m. local |
| Online reference | irs.gov/businesses/employer-identification-number | — |
Verified on November 4, 2026 against the IRS pages cited in the library entries that use these numbers.