Free founder resources

US tax filing, explained clearly.

Practical guides for foreign-owned LLC founders without the tax jargon, scare tactics, or guesswork.

Lifting the corner of Form 5472 to reveal its field grid

What is Form 5472?

Complete guide to IRS Form 5472 who must file, what's required, and how to comply.

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Holding Form 5472 as a shield against a $25,000 penalty tag

Form 5472 Penalties Guide

Understanding the $25,000 penalty, additional fines, and how to avoid them.

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Moving a marker along a timeline from April 15 to October 15

Filing Deadlines & Extensions

Important deadlines for 2025-2026 and how to request a 6-month extension.

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Climbing steps toward a completed Form 5472

Foreign-Owned LLC Filing Guide

Step-by-step guide for foreign owners of U.S. single-member LLCs.

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Form 5472 and Form 5471 standing side by side for comparison

Form 5472 vs Form 5471

Key differences between these two commonly confused IRS forms.

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Paperclipping Form 5472 onto the front of a pro forma 1120

Pro Forma 1120 Guide

How to file the Pro Forma Form 1120 alongside Form 5472 for your disregarded entity.

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Free Filing Tools

Handy utilities to help you prepare your Form 5472 filing.

EIN Formatter

Format and validate your Employer Identification Number.

Business Code Lookup

Find the correct NAICS business activity code for your LLC.

Penalty Calculator

Estimate potential penalties for late or missing filings.

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