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Form 3949-A, Information Referral, page 1
Moderate · 57/100Form Complexity Index

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What this form asks for

The AI fills all of it, from your answers or your documents.

Form 3949-A, Information Referral, is used to report suspected violations of tax laws by individuals or businesses. This form is important for helping the IRS identify and investigate potential tax fraud and ensure compliance with tax regulations.
Fillable fields74
Pages1
Sections10
Form Complexity IndexModerate, 57/100

The AI checks your answers before you download

15 checks built for this form, so a wrong date or a missing answer is caught before anyone else sees it.

Ensures that all required fields in Section A for an individual are completed

The AI ensures that Section A of the Information Referral Form 3949-A is thoroughly reviewed when reporting an individual. It checks for completeness of all mandatory fields such as the individual's name, Social Security Number (SSN) or Taxpayer Identification Number (TIN), date of birth, address, occupation, email, and marital status. If the individual is married, the AI also verifies that the spouse's name is provided. This validation is crucial to ensure that the IRS has sufficient information to identify and investigate the individual in question.

Confirms that all required fields in Section A for a business are filled out

When reporting a business, the AI confirms that all necessary information in Section A is accurately filled in. It checks for the business name, Employer Identification Number (EIN), contact telephone number, physical address, email address, and the business's website if known. This comprehensive check is essential for the IRS to have the correct details to proceed with any investigation into the reported business's tax matters.

Verifies that both parts of Section A are completed if reporting a business and its owner

In cases where the Information Referral Form 3949-A pertains to both a business and its owner, the AI verifies that both parts of Section A are fully completed. This dual verification process ensures that the IRS receives all pertinent information about the business entity as well as personal details about the owner, which is necessary for a thorough examination of the tax violation allegations.

Checks that all applicable boxes for alleged tax violations in Section B are marked

The AI checks Section B of the form to ensure that all relevant boxes indicating the type of alleged tax law violations are marked. This includes scrutinizing the form for any indications of false deductions, unreported income, or other tax-related offenses. By confirming that the appropriate boxes are checked, the AI assists in providing clear communication to the IRS regarding the nature of the suspected violations.

Validates the inclusion of detailed descriptions in Section B

The AI validates that Section B contains detailed descriptions of the alleged tax violations, including unreported income. It ensures that specific details such as the tax years involved and the estimated dollar amounts, if known, are included. This validation is critical as it provides the IRS with the necessary context and magnitude of the potential tax issues, enabling a more effective investigation process.

Comprehensive Description of Alleged Violation

Ensures that Section B of the Information Referral Form 3949-A contains a detailed account of the alleged tax violation. It confirms the presence of a comprehensive description, including the specifics of 'who' is involved, 'what' the violation is, 'where' it took place, 'when' it occurred, and 'how' the information was obtained. This validation check is crucial for the IRS to understand the nature of the alleged violation and to assess the credibility and detail of the report.

And 9 more checks
  • Attachment Formatting and Reference
  • Completion of Additional Questions in Section B
  • Informant's Contact Information in Section C
  • Form Print and Send-off Readiness
  • Privacy Act and Paperwork Reduction Notice Acknowledgment
  • Appropriate Use of Form 3949-A
  • Alternative Form 211 for Rewards
  • Completeness of Information
  • Accuracy of Information

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How to Fill Out Form 3949-A Online for Free in 2026

What the AI walks you through.

  1. Visit instafill.ai site and select Form 3949-A.
  2. Provide information about the person or business.
  3. Describe the alleged tax law violation.
  4. Fill in your contact information if desired.
  5. Sign and date the form electronically.
  6. Check for accuracy and submit the form.

Common Mistakes in Completing Form 3949-A

The ones the AI is built to catch.

Incomplete or inaccurate information in Section A
Failure to provide complete and accurate information in Section A of Form 3949-A can lead to processing delays or even rejection of the form. For individuals, omitting their SSN or date of birth can cause issues. For businesses, neglecting to provide their EIN can result in similar complications. To avoid this mistake, ensure all required information is provided in full and double-check for accuracy before submitting the form.
Incorrectly checking boxes or failing to check all applicable boxes in Section B
Section B of Form 3949-A requires taxpayers to check all boxes that apply to the alleged tax violation. Failing to check the correct boxes or not checking all applicable boxes can result in incorrect processing of the form. To prevent this mistake, carefully review the instructions for Section B and check all boxes that correspond to the alleged tax violation(s).
Insufficient details of unreported income and tax years in Section B
Providing insufficient details of unreported income and the tax years involved in Section B can hinder the IRS's ability to properly investigate the alleged tax violation. To avoid this mistake, be as specific as possible when describing the unreported income, including the nature of the income, the amount, and the tax years involved. Additionally, ensure all required information is provided to the best of your ability.
Unclear or incomplete descriptions of alleged tax violations in Section B
Failing to describe the facts of the alleged tax violation clearly and concisely in Section B can lead to confusion and delays in the investigation process. To prevent this mistake, provide a detailed and accurate description of the alleged tax violation, including the specific tax laws that were violated, the amount of tax due, and any relevant documentation or evidence. Be sure to answer all questions in Section B, including those regarding the availability of books/records and the danger level of the taxpayer.
Incomplete contact information in Section C
One of the most common errors on the Information Referral Form 3949-A is the failure to provide complete contact information in Section C. This section requires the submitter to provide their name, address, and telephone number. It is essential to ensure that all fields are filled out accurately and completely to facilitate proper processing of the form. Incomplete contact information may result in delays or even rejection of the form. To avoid this mistake, double-check all contact information before submitting the form.
Sending the form to an incorrect address or failing to send it to the Internal Revenue Service
Another common mistake on the Information Referral Form 3949-A is sending the form to an incorrect address or failing to send it to the Internal Revenue Service at all. It is crucial to follow the instructions carefully and send the form to the correct address to ensure timely processing. Failure to send the form to the IRS may result in delays or even the rejection of the form. To avoid this mistake, double-check the mailing address provided on the form and ensure that it is complete and accurate before mailing the form.
Using the form for issues other than reporting suspected tax law violations
Ignoring the instructions and using the Information Referral Form 3949-A for issues other than reporting suspected tax law violations is a common mistake. This form is specifically designed for reporting suspected tax law violations to the IRS. Using it for any other purpose may result in delays or even rejection of the form. To avoid this mistake, carefully read and follow the instructions provided on the form before filling it out.
Ignoring the Privacy Act Notice and Paperwork Reduction Notice
Failing to read and understand the Privacy Act Notice and Paperwork Reduction Notice before filling out and submitting the Information Referral Form 3949-A is a common mistake. These notices provide important information about how the IRS will use the information provided on the form and the time required to complete it. Ignoring these notices may result in unintended consequences or delays. To avoid this mistake, carefully read and understand the Privacy Act Notice and Paperwork Reduction Notice before filling out and submitting the form.

Frequently Asked Questions About Form 3949-A

 

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This plan is for your Form 3949-A: your own AI agent fills it as often as 5 times a month. To fill other forms and upload your own, choose a Professional plan from your account.
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How does the AI fill out Form 3949-A?
You answer a few questions in plain words, or upload a document you already have. The AI reads what you give it and puts each answer into the right field of Form 3949-A, on every page, in seconds. It checks the answers against the form's own rules, and you review and change anything before you download, print or sign.
What happens to my information?
It is encrypted in transit and at rest, and it is never used to train AI.
How complex is Form 3949-A to fill out?
Form 3949-A has a Form Complexity Index of 57 out of 100, in the moderate tier: 74 fillable fields across 1 page. Instafill.ai's AI fills it in under a minute, with every field there for you to review before you download.
What is the purpose of Form 3949-A, Information Referral?
Form 3949-A is used to report suspected tax law violations to the Internal Revenue Service (IRS).
Who should use Form 3949-A?
Any individual or business that suspects a tax law violation by another individual or business should use Form 3949-A to report it to the IRS.
What information is required in Section A for reporting an individual?
The following information is required for reporting an individual: name, social security number or taxpayer identification number, date of birth, street address, city, state, ZIP code, occupation, email address, marital status, and name of spouse (if married).
What information is required in Section A for reporting a business?
The following information is required for reporting a business: business name, employer identification number (EIN), telephone number, street address, city, state, ZIP code, email address, and website.
What types of tax violations can be reported on Form 3949-A?
Form 3949-A can be used to report various types of tax violations, including false exemptions, false deductions, multiple filings, organized crime, unsubstantiated income, earned income credit, public/political corruption, false/altered documents, unreported income, narcotics income, kickback, wagering/gambling, failure to withhold tax, failure to file return, failure to pay tax, and other violations.
What should be done if unreported income and tax years are known?
If unreported income and tax years are known, they should be reported by filling in the tax years and dollar amounts in the appropriate sections of the Form 3949-A.
What should be done if additional information is available?
Additional information should be provided in Section B, if possible. This can help the IRS process the form more efficiently and accurately.
What happens if the reported taxpayer is considered dangerous?
If the reported taxpayer is considered dangerous, the IRS will take appropriate measures to ensure the safety of their employees and the public. This may include notifying the appropriate authorities.
What information about the person reporting is required in Section C?
The person reporting's name, telephone number, best time to call, street address, city, state, and ZIP code are optional but helpful if the IRS needs to contact them for additional information.
Where should the completed Form 3949-A be sent?
The completed Form 3949-A should be sent to the Internal Revenue Service at PO Box 3801, Ogden, UT 84409.
What is the deadline for submitting Form 3949-A?
Form 3949-A does not have a specific deadline for submission. However, it is strongly recommended to submit the form as soon as possible after discovering a suspected tax law violation.
Is there a reward for providing information leading to the discovery of tax law violations?
Yes, there is a reward program for providing original information leading to the discovery of tax law violations. To apply for a reward, use Form 211, Application For Award For Original Information.
What forms should not be used instead of Form 3949-A?
Form 3949-A should not be used to report suspected misconduct by a tax return preparer, to report identity theft, or to report abusive tax avoidance schemes or promoters.
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