Filing Form 5472 by Fax or Mail: What Proof of Sending Exists and How to Keep It

Short answer

• A Form 5472 for a foreign-owned single-member LLC cannot be e-filed. The IRS instructions allow two methods: fax or mail.
• The proof you can hold is a record of sending: the fax transmission report, or the postal receipt if you mail it. It shows what was sent and when. It is not an IRS acceptance.
• Keep that proof with a signed copy of everything you sent.
• At Melya the Form 5472 + Pro Forma 1120 costs $249 per year: both forms prepared, you sign, Melya faxes them and gives you the transmission report.
• When you compare offers, ask four things: the displayed price, what is included, who signs, and what proof you receive.

What the IRS says about how to file

A single-member LLC owned by a non-US person is, for US tax purposes, a foreign-owned U.S. disregarded entity (DE). The Instructions for Form 5472 (Rev. 12-2024) say that such an entity "will now be required to file a pro forma Form 1120, U.S. Corporation Income Tax Return, with Form 5472 attached". They add that the only information required on the Form 1120 is the name and address of the entity and items B and E on the first page. (Who has to file at all is covered in this guide.)

On the method, the instructions are explicit:

• "File these forms by: Fax (300 DPI or higher) to 855-887-7737, or Mail to" the dedicated Ogden address, which the instructions give as Internal Revenue Service, 1973 Rulon White Blvd, M/S 6112 Attn: PIN Unit, Ogden, UT 84201.
• "If you are a foreign-owned U.S. DE, you cannot file Form 5472 electronically."

So no online platform can e-file this packet for you. Details on the fax number, the address and the Form 7004 extension are in the fax and mailing address guide; this page is about the proof.

The stakes: the instructions state that a $25,000 penalty is assessed on a reporting corporation "that fails to file Form 5472 when due and in the manner prescribed". The same paragraph says the penalty also applies for failure to maintain the records required by Regulations section 1.6038A-3. Being able to show when and how you filed is therefore not a formality.

Which proof actually exists

Be precise here, because two different things get confused: proof that you sent a document, and confirmation that the IRS accepted it.

Fax

A fax machine or an online fax service produces a transmission report (or confirmation page). Look for the number dialed, the date, the time, the number of pages and a success status. That report proves that a transmission to that number took place, on that date, with that many pages. It does not prove that anyone at the IRS reviewed the forms, agreed with them or "accepted" them. We read the Instructions for Form 5472 for any mention of an IRS acknowledgement or confirmation for a faxed or mailed foreign-owned DE filing and found none, so the instructions give you no IRS receipt to wait for. Treat the transmission report as your evidence.

One more limit: the regulation on timely mailing, described below, covers mail and designated delivery services. It does not mention fax. We therefore do not claim any special legal status for a fax report beyond what it shows on its face.

Mail

For paper mailed to the IRS, section 7502 of the Internal Revenue Code and 26 CFR 301.7502-1 apply. In summary, the regulation says:

• A document is generally deemed filed on the date of the postmark stamped by the U.S. Postal Service, if it is in a properly addressed envelope, deposited in the United States mail with sufficient postage, on or before the due date. A postmark from a foreign mail service does not qualify: section 7502 "does not apply to any document or payment that is deposited with the mail service of any other country".
• The sender who relies on a postmark "assumes the risk that the postmark will bear a date on or before" the due date.
• Registered or certified mail removes that risk. For registered mail, the date of registration is treated as the postmark date. For certified mail, the date on the sender's receipt, if the postal employee postmarked it, is treated as the postmark date.
• Proof of proper registered or certified mailing is also prima facie evidence that the document was delivered to the IRS. The regulation adds that, other than direct proof of actual delivery, proof of proper use of registered or certified mail (or of a designated private delivery service) is the exclusive means to establish prima facie evidence of delivery.

Prima facie evidence of delivery is still not an acceptance by the IRS, and it does not say the return was complete or correct. It answers one question only: was it sent on time, and did it arrive?

How to keep the file

Pub. 583 says you must keep records "as long as they may be needed for the administration of any provision of the Internal Revenue Code", which generally means until the period of limitations for that return runs out. Its Table 3 lists the periods; for a person who does not file a return, the period is not limited. The Form 5472 instructions separately warn about the records required by Regulations section 1.6038A-3.

For each year, keep together:

1. the signed Form 1120 (pro forma) and Form 5472, exactly as sent;
2. the fax transmission report, or the certified or registered mail receipt;
3. the Form 7004 and its proof, if you extended;
4. the documents behind the figures in Part V: bank statements and records of each contribution, loan or distribution.

Pub. 583 gives no specific period for this particular kind of proof, so the period below is our suggestion, not an IRS rule: keep these files for as long as the LLC exists and after it closes, since they cost nothing to store and cannot be recreated. Store a PDF copy somewhere other than your email only.

What Melya does for $249, and what it does not

The full price list and the step-by-step process are on the fixed-price service page.

Included in Form 5472 + Pro Forma 1120, $249:

• Melya prepares both forms from the information you provide.
• You sign them.
• Melya faxes them to the IRS and gives you the transmission receipt.
• The extension (Form 7004) is included if needed.
• Past years: $249 each.

Not included and not promised:

• Melya does not represent you before the IRS. If the IRS writes to you, Melya cannot speak to the IRS on your behalf.
• Melya does not e-file anything, and could not for this form.
• Melya does not say the IRS "accepted" your filing. The proof is a record of transmission, as described above.
• Melya does not guarantee that you will not receive a penalty or a letter.
• Melya gives no tax advice for your country of residence.

Melya is not a CPA, an enrolled agent or a law firm. If you need more than preparation and transmission, for example because the IRS has already sent a penalty notice, that is a separate question (see the penalty abatement guide). For years already missed, see the catch-up guide.

How to compare Form 5472 offers

Use objective criteria, and write the answers down before paying.

Two of these rows follow directly from the IRS text above: the instructions rule out electronic filing for this entity, and they describe no IRS acknowledgement. An offer that contradicts either one deserves a question.

FAQ

Will the IRS send me a confirmation? The Instructions for Form 5472 do not describe one for this filing. Keep your own proof of sending.

Is a fax report as good as certified mail? They are different. Certified and registered mail are covered by a specific regulation (26 CFR 301.7502-1) that sets what they prove. That regulation does not mention fax. A fax report shows the details of the transmission; we do not claim more.

Can I mail it from outside the United States? Section 7502 does not apply to a document deposited with the mail service of another country, per the regulation. If you mail the forms, that is a reason to use fax, or a US-based mailing.

What if I filed in the past without keeping the fax report? Gather what you have (copies, bank records, anything showing the transmission) and read the catch-up guide linked above.

Does the $249 include the extension? Yes, if an extension is needed.

Does this page cover LLCs with several owners? No. It covers the foreign-owned single-member LLC (disregarded entity) described in the instructions quoted above.

Sources

• IRS, Instructions for Form 5472 (Rev. 12-2024): "When and Where To File", "Electronic Filing of Form 5472", "Penalties".
• eCFR, 26 CFR 301.7502-1, timely mailing treated as timely filing.
• Cornell LII, 26 U.S.C. 7502.
• IRS, Publication 583, "How Long To Keep Records" and Table 3.

General information, not legal or tax advice. Your situation may differ; for advice on your own case, consult a licensed professional.