How to Fax Form 5472 to the IRS From Overseas

TL;DR

For a foreign-owned disregarded LLC, the Form 5472 + pro forma 1120 package can be faxed to the IRS’s dedicated line (confirm the current number in the IRS instructions for Form 5472) — and for owners overseas, an online fax service makes this the fastest, best-evidenced filing method: instant transmission, a time-stamped confirmation, and no dependence on international mail.

Why fax is the overseas filer’s friend

This package cannot be e-filed, which leaves mail or fax. From China or anywhere overseas, mail near the deadline means customs, carriers, and prayer. Fax is transmitted in minutes, produces a dated confirmation page, and lands regardless of postal conditions — which is exactly the kind of proof you want standing between you and a $25,000 penalty question.

Step by step from anywhere in the world

1. Finish the package: completed Form 5472, pro forma 1120 cover, signatures in place — combined into one clean PDF, correct page order.
2. Add a one-page cover sheet: LLC name, EIN, tax year, “Form 5472 with pro forma Form 1120,” page count, and a contact.
3. Pick an online fax service (any reputable SaaS fax works — you upload a PDF, it faxes). Cost is a few dollars.
4. Verify the current IRS fax number in the latest official Form 5472 instructions — the IRS has used a dedicated line for foreign-owned DE filings for years, but numbers can change; always send to the number in the current-year instructions.
5. Transmit and download the confirmation — date, time, destination, pages.
6. Archive everything together: the sent PDF + the confirmation, kept with that year’s records.

Fax filing: what it is NOT

• Not a workaround — it is an officially sanctioned channel for this specific package, per the IRS’s own instructions.
• Not a substitute for a complete return — a beautifully faxed but incomplete 5472 is still an incomplete 5472.
• Not confirmation of acceptance — the fax receipt proves transmission; the IRS does not send back a “received” letter. That’s normal; your confirmation page is the record.

If the deadline is tomorrow

Fax was made for this moment: finalize the PDF, transmit before midnight in your favor of documentation, keep the confirmation — then consider whether a Form 7004 extension should have been the calmer play, and calendar it for next year. Already past the date? Go straight to the late-filing playbook.

Prefer to never think about IRS fax numbers again? Our Form 5472 service prepares, signs, and transmits the package from inside the U.S. — confirmation archived for you.

This article is general information, not tax or legal advice. Always confirm the current filing address and fax number in the latest IRS Form 5472 instructions before sending.