Pro Forma 1120 & Forms 5472 Done in Minutes
The only platform that automates the entire foreign-owned SMLLC workflow for compliance-ready filing.
Bulk Form 7004 Extensions
Generate unlimited IRS extension forms for your foreign-owned SMLLC clients. Free, instant, and 100% browser-based.
No credit card required
Skip Client Setup. We Pre-Fill Your 1120 + 5472.
Don't waste time creating new client files. Upload your prior year PDFs now, and we handle the data extraction. On Feb 15, your dashboard will be fully populated with Pro-Forma 1120 + Form 5472 (Parts I, II, III).
Founding Partner Offer: Free Data Migration for first 10 founding partners.
Foreign-Owned Single-Member LLC Filings Made Effortless
Don't Touch Pro Forma 1120 & Form 5472 (Parts I–III)
If you have the prior year's return, FastFile automatically pre-fills the forms - no manual edits required.
Zero PDF Editing Needed
Generate fully assembled PDFs ready for review, without ever opening a PDF editor.
Form 7004 Preparation with One Click
Prepare extensions for your clients effortlessly.
Pre-Filled Recurring Client Data
Reuse prior-year filings to save hours on recurring clients.
Auto-Calculated Transactions
Total transactions for individual 5472s and all 5472s calculated automatically.
No Word Documents Needed
Additional statements are generated automatically — no Word editing required.
Secure & Reliable
All data is protected with industry-standard security practices aligned with SOC 2 principles.
Upload Existing Documents in Bulk
Upload existing documents in bulk. Our engine processes them instantly to get you started in minutes.
Upcoming Features
Automated Client Data Collection
Gather all information needed to complete the return with no manual input.
Draft-Only Review
Tax preparers only need to review pre-filled drafts—FastFile handles the rest.
One-Click IRS Faxing
Automatically send completed returns directly to the IRS with a single click.
FastFile is currently in beta—book a demo to see these features in action.
Book a DemoFastFile is in beta!
Book a demo to explore the platform and get a sense of average return pricing.
Book a Demo