Form SS-4 Walkthrough Line by Line

Q: Do non-US residents need an SSN to apply for an EIN?

No. Non-residents enter 'Foreign' on Line 7b. The IRS accepts the application by fax (or mail) for non-residents. Anonymousllc.co handles fax submission and follow-up.

Q: What is the responsible party on Form SS-4?

The individual who ultimately controls, manages, or directs the LLC and the disposition of its funds and assets. Per IRS rules, this must be a natural person — not another entity. For a single-member LLC, this is typically the sole member.

Q: How long does an EIN take after filing SS-4?

US-resident online filing: instant. US-resident fax: 4-7 business days. Non-resident fax: 4-6 weeks (sometimes faster). Anonymousllc.co's process averages 5-7 days for US-residents and 4-6 weeks for non-residents.

Q: What if I make a mistake on Form SS-4?

Don't file a second SS-4 — call the IRS Business & Specialty line (800-829-4933) to correct. For non-residents, work through your Third-Party Designee (Anonymousllc.co) so the IRS can fax corrections quickly.

Q: Can the EIN be issued in a different name from the Articles?

No. The IRS issues EINs to the exact legal name on Form SS-4 Line 1. Banks compare the EIN letter against the Articles — any discrepancy will block account opening. Anonymousllc.co quality-checks this before fax submission.

Form SS-4 Walkthrough Line by Line — Anonymousllc.co's 2026 reference. Covers the rule, the controlling statute or regulation, common questions, and how Anonymousllc.co handles it in practice. Primary-source citations linked throughout.

By Alif Al Razi, Tax & Compliance Lead · Last updated 2026-05-21

IRS Form SS-4 line-by-line

Form SS-4 is the IRS application for an Employer Identification Number. Every US LLC needs one to open a bank account, file taxes, and (where required) report BOI. This page walks through every line of Form SS-4 for both US-resident and non-resident founders.

Sources

Lines 1-2 — Legal name & trade name

Line 1: the LLC's legal name as it appears on the Articles of Organization (e.g. 'Acme Holdings LLC'). Must match EXACTLY. Line 2: trade name / DBA if different — leave blank if none. Mismatched names are the #1 reason SS-4 gets rejected or causes downstream EIN-letter problems with banks.

Lines 3-7 — Address & responsible party

Lines 3-6: mailing and physical address. Use a US address if possible — non-US addresses can cause IRS processing delays. Anonymousllc.co's standard address is the registered agent's. Line 7a: responsible party's name (the human ultimately controlling the LLC). Line 7b: SSN, ITIN, or EIN of the responsible party — non-residents put 'Foreign' if no SSN/ITIN.

Lines 8-10 — Entity classification

Line 8a: 'Yes' if it's an LLC. Line 8b: number of members. Line 8c: 'Yes' if organised in the US. Line 9a: 'Limited liability company (LLC)' checkbox, then specify federal tax classification (disregarded entity, partnership, S-corp, C-corp). Line 10: 'Started new business' is the standard reason.

Lines 11-14 — Dates & employees

Line 11: date business started (formation date). Line 12: closing month of accounting year (December for most). Line 13: highest number of employees expected in the next 12 months — '0' for a holding LLC. Line 14: 'Yes' to indicate whether employment-tax liability is expected (almost always 'No' for an anonymous LLC).

Lines 15-17 — Activity

Line 15: first wages paid date (leave blank if none). Line 16a: principal activity (e.g. 'Real estate holding', 'E-commerce', 'Consulting'). Line 16b: principal product/service. Line 17: 'Yes' if applied for an EIN before.

Third-Party Designee section

When Anonymousllc.co files for you, we are listed as the Third-Party Designee. This authorises the IRS to discuss the application with us during processing. Non-resident applicants benefit most — the IRS will accept clarifications from us via fax without bouncing back to the applicant.