Form 5472 + 1120 filing service
1120 Pro Forma Instructions (Foreign-Owned LLCs)
Filling out a pro forma Form 1120 is completely different from a real corporate tax return. You complete almost nothing — fewer than 10 fields total. Below is the field-by-field breakdown of what to fill in, what to leave blank, the schedules to ignore, signature requirements, and the common mistakes that cause the IRS to misprocess your filing as if it were a real corporate return.
15 min
average completion
IRS forms
filled, not redrawn
Faxed for you
to Ogden PIN Unit
Receipt stored
proof of filing
What do you need to gather before you start?#
What do you fill in on Page 1 header?#
What income section details do you leave blank?#
What deduction section details do you leave blank?#
What tax and payment section details do you leave blank?#
What do you do with schedules on pro forma 1120?#
How do you complete the signature block?#
What mistakes on pro forma 1120 trigger IRS notices?#
What is the correct assembly order for the filing package?#
Use our pre-filled pro forma 1120#
Pricing
Flat-rate Form 5472 filing.
One-time fee per filing. No subscription. IRS fax delivery to the Ogden PIN Unit is included on every plan.
Standard
Prepared in 3-5 business days
$199/ filing
- ✓Reviewed by a qualified tax accountant before submission
- ✓Form 5472 + pro forma 1120 prepared
- ✓Fax filing to IRS Ogden included
- ✓Filing confirmation
- ✓Reasonable-cause letter (for late filings)
- ✓Email support
+ $149 per additional year·Saves you from the $25,000-per-form IRS penalty
Frequently asked questions
- Should I write 'N/A' or 'None' in blank fields?
- No. Leave the fields completely untouched. The IRS instructions for pro forma filings specify the unused sections stay blank, not marked. Writing N/A or 0 can cause the return to be processed as a real corporate filing.
- What if I don't know my LLC's total assets at year-end?
- It's usually the ending balance in your business bank account, plus any receivables, inventory, or equipment. If your LLC only has a bank account, use that ending balance. The IRS doesn't require itemized breakdown — just the total.
- Can I print a blank 1120 PDF and fill it by hand?
- Yes, the IRS accepts handwritten Form 1120. Use blue or black ink, write neatly, and stamp "Foreign-Owned U.S. DE" at the top. Our service generates a typed PDF you can sign — far fewer transcription errors than handwriting.
- Which tax-year version of Form 1120 do I use?
- The form for the tax year that ENDED. For tax year 2024 (filed by April 15, 2025), use the 2024 Form 1120. Always download the current year's blank form from irs.gov — last year's form may have field number changes that cause issues.
- Do I attach the IRS instructions to my filing?
- No. The IRS doesn't need the instructions back — those are reference for you. Only the forms themselves (1120, 5472, Part V supporting statement, cover letter, reasonable cause statement if applicable) go in the package.
- What if I made a mistake after filing?
- File an amended return. Check the "Amended return" box at the top of Form 1120, correct the errors, and attach a brief explanation. Amendments don't waive any penalty already assessed but they correct the underlying record.
- Can I use a foreign address on the 1120?
- No. The 1120 expects a US address — typically your registered agent's address. Your personal foreign address goes on Form 5472 Part II as the owner address.
- Do I need to attach Form 4562 for depreciation?
- No. Form 4562 is for depreciation on a real corporate return. Pro forma 1120 has no depreciation deduction (the deductions section is blank), so 4562 doesn't apply.
- What if Schedule K asks about foreign accounts and my LLC has a non-US bank account?
- Most foreign-owned DEs bank with US-based services (Mercury, Wise USD, Relay). If your LLC has a non-US financial account, you may need to answer the Schedule K foreign-account questions and potentially file FBAR for the LLC. Talk to a tax professional if this applies — our wizard's standard package assumes US-based banking.
- Where can I see what a completed pro forma 1120 looks like?
- Run our wizard with sample data — at the PDF preview step you'll see exactly what gets faxed to the IRS. The pro forma 1120 page shows the "Foreign-Owned U.S. DE" stamp, filled header, empty body, and signature-ready format.
Related guides
Pro Forma Form 1120 — Plain-English Guide
Foreign-owned US single-member LLCs file pro forma Form 1120 as the procedural envelope for Form 5472. "Pro forma" means most of the form stays blank — you only fill in entity identification fields and stamp "Foreign-Owned U.S. DE" at the top. This guide shows exactly which fields to fill, which to leave empty, why the form even exists in this format, and how to assemble the full package the IRS expects.
Form 1120 for Foreign-Owned LLCs
If you are a non-US person who owns a US single-member LLC, you must file Form 1120 — but in a special "pro forma" version where almost every field stays blank. The 1120 exists only as an envelope for Form 5472 (the form that actually matters). This is exactly how it works, what to fill in, what to leave empty, how to assemble the full package, and why filing 1120 doesn't subject your LLC to US corporate income tax.
Form 1120 for a Disregarded Entity (Foreign Owner)
A US LLC owned by a single non-US person is a "disregarded entity" — meaning the IRS treats it as if it doesn't exist for income tax purposes. So why does it file Form 1120? Because Treasury Regulation § 1.6038A-1 requires Form 5472 to be attached to a tax return, and a pro forma Form 1120 is the IRS-specified attachment vehicle. This is the complete explanation, the regulation's history, what the filing looks like, and how to avoid the common pitfalls.
Form 5472 Instructions: Plain-English Walkthrough
The official IRS instructions for Form 5472 are 12 pages of dense regulatory language written for tax professionals. This is what each part actually means without the jargon, exactly what to put in each box, the common mistakes that trigger the $25,000 penalty, and how to put together a complete filing that the IRS will accept on the first read.