All forms

Tax Forms

Form 3949-A

Information Referral

Fyllyo uses local AI to interpret your documents, calculate required answers and fill PDF forms. Review the answers and their sources before saving, without uploading client documents.

A simpler way to prepare a PDF.

01

Pick a form

Choose a built-in template or set up your own blank fillable PDF once.

02

Add client documents

Drop in PDFs, scans, photos, Word files or typed notes. The AI reads them on your computer.

03

Review and save

Check the source lines, confirm key facts and edit the PDF. Uncertain values stay blank and flagged.

Form reference

Before you begin.

Use these notes as a starting point. Check the issuing agency’s current form and instructions for your client’s situation.

Open the source PDF

Fyllyo helps prepare PDFs. It doesn’t provide legal or tax advice, determine eligibility, or file forms for you.

Gather Necessary Information

Before you start filling out Form 3949-A, ensure you have all the necessary details. For reporting an individual, gather their name, SSN or TIN, date of birth, address, occupation, email, marital status, and spouse's name if applicable. For a business, you'll need the business name, EIN, contact number, address, email, and website.

Details worth checking

Complete Individual Information

Incomplete or inaccurate information for an individual in Section A can cause delays or rejection. Missing details like SSN or date of birth can prevent the IRS from identifying the person. Complete and accurate information helps ensure the IRS can properly investigate the reported individual.

Accurate Business Information

Failing to provide complete business details in Section A, such as EIN or contact information, can hinder IRS investigations. Accurate and complete business information is essential for the IRS to pursue tax violation reports effectively.

Dual Completion for Business and Owner

When reporting both a business and its owner, incomplete sections for either party can lead to investigation issues. Both the business and owner sections must be fully completed for the IRS to take effective action.

Correctly Marking Violation Types

Incorrectly checking or missing boxes for alleged tax violations in Section B can mislead IRS investigations. Properly marked boxes guide the IRS in understanding the nature of the allegations.

Detailed Violation Descriptions

Insufficient or unclear descriptions of alleged tax violations in Section B can delay investigations. Detailed information about the nature, amount, and tax years of unreported income is crucial for IRS processing.

Complete Submitter Contact Information

Incomplete contact information in Section C can lead to form rejection or delays. Providing full details allows the IRS to follow up if needed, ensuring smooth processing.

Set up your own form once.

Fyllyo’s cloud service prepares a reusable template from your blank fillable PDF and setup instructions. No API key is required. Client documents stay on your computer, and subsequent filling runs locally. Check the first few filled forms carefully.

Download for Mac Suggest a feature or share feedback →

Mac with M1 or later · 16 GB memory recommended · About 8 GB free disk space