Form 3949-A: Information Referral (Report Suspected Tax Fraud)
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IRS Form 3949-A, Information Referral, is the form used to report a person or business you suspect of violating federal tax law — unreported income, false deductions, unfiled returns, or paying employees in cash off the books. You describe the alleged violation in Section B and mail the form to the IRS; providing your own details in Section C is optional, so you can report anonymously. With JustFill you upload the blank IRS Form 3949-A PDF, the AI auto-detects every field, you type or dictate your answers, and you download the completed form free.
Suspect a business is paying workers under the table, or that someone is hiding income from the IRS? Form 3949-A, Information Referral, is how you report suspected violations of federal tax law by an individual or a business. Section A identifies who you are reporting, Section B describes the alleged violation — with checkboxes for common issues like unreported income, false deductions, failure to file, and failure to withhold tax — and Section C asks for your contact details, which you may leave blank to stay anonymous. It is not the right form for identity theft (that is Form 14039). JustFill makes the PDF fillable in your browser: the AI auto-detects every field and checkbox, you type or dictate your report, and you download it free.
What each section of Form 3949-A asks for. JustFill’s AI will detect these fields automatically when you upload the PDF — review the breakdown below so you know what to enter.
Name, address, SSN (if known), date of birth, occupation, and marital status of the person you are reporting.
Business name, address, EIN (if known), and a description of what the business does.
Checkboxes for the type of violation: unreported income, false exemptions or deductions, failure to file, failure to withhold or pay tax, kickbacks, false documents, and more.
The tax years involved and your estimate of the unreported income for each year.
A factual description of the violation: who, what, when, how you know, and where records or funds are located.
Whether books or records are available, whether you consider the person dangerous, and banks or financial institutions they use.
Your name, address, and phone. You may leave this blank to report anonymously.
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Official source: Form 3949-A on IRS’s website
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