If you suspect that a person or business is violating U.S. tax law, the IRS’s standard public referral is Form 3949-A, Information Referral. The IRS accepts this referral online and provides a PDF option. A non-award referral may be anonymous. If you want to seek a whistleblower payment, do not use an anonymous Form 3949-A alone: file Form 211, Application for Award for Original Information, with your identity, contact details, signature, and supporting information.
Report what you can substantiate as suspected conduct, not as a proven crime. The IRS asks for specific, credible facts about the person or entity, the alleged violation, relevant documents, and how and when you learned the information. Unsupported accusations and speculation can make a submission less useful.
As an Amazon Associate I earn from qualifying purchases.
Which IRS form should you use?
The correct route depends on both the suspected conduct and whether you want to be considered for an award.
PC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Outdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware match| Situation | Primary route | Identity and payment implications |
|---|---|---|
| Suspected tax-law violation by an individual or business | Form 3949-A, Information Referral | The IRS says an ordinary referral can be anonymous. It is not an award application. |
| You have original information and want possible compensation | Form 211, Application for Award for Original Information | You must identify yourself, provide contact information, sign under penalty of perjury, and satisfy the whistleblower program’s eligibility rules. |
| Suspected abusive tax promotion or abusive tax preparer activity | Form 14242 | Use the specialized route rather than treating the matter as an ordinary evasion referral. |
| Complaint involving a tax-exempt organization, employee plan, or government entity | Form 13909 | This is a separate IRS complaint process. |
| Identity theft involving tax records | Form 14039 | Identity-theft reports follow a dedicated process. |
| Waste, fraud, or abuse by an IRS employee | TIGTA | Send alleged IRS employee misconduct to the Treasury Inspector General for Tax Administration. |
The IRS’s reporting hub, identified in its current guidance as “Report tax fraud, a scam or law violation,” helps classify the issue and select a route. The IRS’s form pages and online reporting experience were current on October 13, 2026.
#1 Best Overall
What conduct belongs on Form 3949-A?
Form 3949-A is intended for suspected violations by an individual or business. Examples listed by the IRS include:
- Unreported income or sales
- Failure to file a required tax return
- Failure to pay taxes that are due
- Failure to withhold or remit employment taxes
- False deductions, exemptions, or credits
- Altered or fabricated tax documents
- Kickbacks or other arrangements that conceal taxable income
A tax bill you dislike, a business dispute, or a belief that someone is wealthy but pays little tax is not, by itself, evidence of evasion. Describe the observable facts that connect the conduct to a possible tax-law violation. If you are unsure whether the matter is tax fraud, the IRS reporting hub can direct you to a more appropriate category.
Describe a suspicion without declaring guilt
Use language such as “I believe the business may have omitted cash receipts” or “The records I received appear inconsistent with the filed figures.” Avoid presenting an allegation as an established crime. The IRS—not the reporter—determines whether the information warrants examination or another action.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Form 3949-A versus Form 211
The two main options are not interchangeable. Choose before submitting so that your identity, evidence, and expectations match the program.
| Comparison point | Form 3949-A referral | Form 211 award claim |
|---|---|---|
| Primary purpose | Alert the IRS to suspected tax-law noncompliance. | Apply for an award based on original information that contributes to proceeds collected. |
| Anonymity | Permitted for a non-award report, according to IRS guidance. | Not compatible with an award claim; the claimant must provide identifying information. |
| Signature requirement | Use the form’s required submission information. | Signed under penalty of perjury. |
| Evidence expected | Specific, credible facts, target identity if known, and available documents. | The same core information, plus how and when you learned it and the details needed to establish eligibility. |
| Payment | No payment is promised through the ordinary referral. | The IRS describes awards generally as 15%–30% of amounts collected because of the information, subject to eligibility and program rules; another IRS overview describes awards of up to 30% of proceeds collected. |
The 15%–30% figures are conditional percentages in current IRS guidance as of 2026, not a guaranteed return or a percentage of the tax balance merely alleged. Payment depends on an eligible claim and proceeds actually collected because of the information.
Rank #2
- Ideal for Gifting
- Ideal for a bookworm
- Compact for travelling
How to file an ordinary suspected-evasion referral
- Confirm that the issue is an IRS tax-law matter. Identify the person or business, the tax conduct, and the relevant period. Use a specialized channel if the issue is identity theft, an abusive promotion, a tax-exempt organization, or IRS employee misconduct.
- Collect facts you already possess. Write down names, addresses, business names, locations, dates, amounts, account or invoice references, and the source of each fact. Include the target’s taxpayer identification number only if you know it; do not guess.
- Organize supporting documents. Useful material can include invoices, ledgers, payroll records, contracts, payment records, emails, or copies of tax documents that directly support the allegation. Submit copies or digital files as the form permits, and keep your own copy.
- Explain the suspected violation. State what you observed, how it may conflict with tax obligations, and when it occurred. Separate direct knowledge from information someone else told you.
- Use the IRS online Form 3949-A experience or the PDF option. The IRS says both routes are available. Complete required fields, review names and dates, and attach the documents that make the allegation understandable.
- Decide whether to identify yourself. An ordinary non-award referral may be anonymous. If you provide contact information, understand that the IRS’s confidentiality protections are governed by law and are not an absolute promise of secrecy.
- Submit and retain a record. Save the completed form, a list of attachments, and any confirmation generated by the online system. Do not repeatedly send the same material merely because you have not received a response.
What makes a report credible and useful?
The IRS emphasizes specificity. A concise report with verifiable details is more useful than a long narrative built on assumptions.
Identify the target
- Full legal name or business name and any known aliases
- Current or former address and business location
- Taxpayer identification number, if known
- Relevant employer, partners, preparer, or related entities
Define the conduct and time period
- What income, transaction, deduction, withholding, or filing appears incorrect
- Tax years or specific dates involved
- Approximate amounts, with an explanation of how you calculated them
- Whether the conduct appears continuing or limited to a past period
Explain your firsthand connection
For each important fact, say whether you saw it yourself, created the record, received it in your work, or learned it from another person. For a potential Form 211 claim, the IRS specifically asks how and when you learned the information. This explanation helps distinguish original knowledge from rumor or publicly available material.
Use documents lawfully
Provide records you are legally entitled to possess. Do not trespass, hack an account, intercept communications, steal files, or encourage another person to violate a law to obtain evidence. The IRS guidance asks for available documentation; it does not instruct reporters to conduct an independent investigation.
How to seek a whistleblower award with Form 211
A Form 211 claim is a separate application for an award for original information. The IRS accepts secure online submissions for the whistleblower process and identifies the required information in its current guidance.
Information the claim should contain
- Your name, address, telephone number, and other requested contact details
- Your signature under penalty of perjury
- The person or entity’s name, address, and taxpayer identification number, if known
- A specific and credible description of the alleged noncompliance
- Supporting documents and an explanation of what each document shows
- How and when you obtained the information
- Any facts relevant to your eligibility and the value of your contribution
Understand the award percentages
The IRS states that awards are generally 15%–30% of the amount collected because of information in an eligible claim. Its Whistleblower Office overview separately describes awards of up to 30% of proceeds collected. Neither statement guarantees that a claimant will receive 30%, or any payment. The IRS must determine eligibility, evaluate the information, and collect proceeds attributable to it under the program’s rules.
Check possible ineligibility issues
The IRS identifies restrictions that can exclude or limit a claim. Examples include certain current or former Treasury employees, federal employees who learned the information while performing official duties, and people subject to particular legal or contractual restrictions on disclosure. Read the current Form 211 instructions and whistleblower guidance before filing if any of those circumstances may apply.
Quick wins for a faster PC:
Scan for outdated or missing drivers - takes under a minuteDriver Scan →Repair Windows errors before they cause bigger problemsFix Now →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Do not file anonymously if you want an award. An anonymous tip can alert the IRS through the ordinary referral route, but an anonymous reporter cannot establish the identity and signature requirements for a Form 211 award claim.
Confidentiality, anonymity, and realistic expectations
The IRS’s 2026 announcement about its centralized reporting page describes confidential reporting. Its whistleblower guidance says the IRS protects a whistleblower’s identity to the fullest extent allowed by law. Those statements do not create absolute secrecy in every circumstance.
Anonymity and confidentiality are different. With an anonymous Form 3949-A referral, the IRS may not know who submitted the information. With an identified report or Form 211 claim, the IRS knows the reporter’s identity and applies legal confidentiality rules. An identified award claimant must also accept that the award program requires personal information and a sworn signature.
Do not promise yourself a payment, a particular investigation, or a specific outcome. The IRS decides how to use referrals and whether collected proceeds qualify for an award. Keep your submission factual and avoid contacting the reported person to confront or threaten them.
Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsRank #4
When another IRS channel is the better choice
Abusive tax promotions or preparers
Use Form 14242 for suspected abusive tax promotions or abusive tax-preparer activity. This route is designed for conduct involving a promotion or preparer rather than a routine allegation about an individual’s unreported income.
Tax-exempt organizations, employee plans, or government entities
Complaints involving a tax-exempt organization, an employee plan, or a government entity belong on Form 13909. Sending the matter through the wrong form can obscure the issue and delay routing.
Identity theft
If someone used your identity or tax information, use Form 14039. Identity theft requires account-protection and identity-verification steps that are different from reporting another taxpayer’s suspected evasion.
IRS employee misconduct
Allegations of waste, fraud, or abuse by an IRS employee go to TIGTA, not the general Form 3949-A process.
Free tools Windows power users keep installed
One-click scans. No signup required.
Common reporting mistakes
- Choosing anonymity while expecting an award. Use Form 211 and identify yourself if compensation is your objective.
- Submitting only a conclusion. “They are committing tax fraud” is not a substitute for dates, transactions, amounts, and records.
- Guessing taxpayer information. Mark information as unknown rather than inventing a Social Security number, employer identification number, or address.
- Mixing personal grievances with tax facts. Explain the tax conduct separately from a contract, employment, divorce, or partnership dispute.
- Sending speculation as fact. Label estimates, secondhand information, and unresolved inconsistencies clearly.
- Using the general route for a specialized complaint. Identity theft, abusive promotions, tax-exempt organizations, employee plans, government entities, and IRS employee misconduct have dedicated channels.
- Obtaining evidence unlawfully. Submit records you can lawfully access; do not create a second legal problem while investigating.
- Assuming a report proves wrongdoing. A referral asks the IRS to evaluate information. It does not establish liability.
Examples of how to frame a report
Unreported cash receipts
Instead of writing “The restaurant hides income,” identify the business, the months involved, the payment system or records you saw, the total receipts you can document, and why those receipts may not appear in reported sales. Attach lawful copies of invoices, point-of-sale summaries, or deposit records if available.
Best Value
- It can be a gift option
- Comes with secure packaging
- Helpful in various ways
False deductions
Identify the deduction, tax year, amount, and records showing that the expense may not have occurred or may have been personal. Explain whether you created the records or merely heard the allegation.
Failure to withhold or pay employment taxes
List the employer, pay periods, worker classifications if relevant, amounts withheld or not withheld, and payroll documents supporting the timeline. Distinguish missing withholding from a separate wage dispute.
Potential award claim
If you possess original records showing a business concealed income and want possible compensation, prepare the same factual narrative for Form 211, then add your identity, sworn signature, source of the information, date you learned it, and documents showing your contribution. Do not submit an anonymous Form 3949-A expecting it to be converted automatically into an award claim.
The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →What happens after you submit?
The IRS evaluates referrals under its own enforcement and confidentiality rules. A submission can be useful even when the reporter cannot prove the entire case, provided it clearly identifies the target, conduct, time period, and supporting facts. The IRS does not turn a public referral into a finding of guilt merely because it was filed.
For an award claim, preserve your submission and evidence, keep contact information current, and read any IRS correspondence carefully. The award process is separate from ordinary tax-return filing and does not guarantee payment simply because the IRS receives the claim.
Bottom line for choosing a route
Use Form 3949-A for a normal, potentially anonymous report that an individual or business may have violated tax law. Use Form 211 when you are seeking a whistleblower award and can identify yourself, sign under penalty of perjury, and provide original, specific, credible information. Use Forms 14242, 13909, or 14039—or TIGTA—when the facts fit those specialized categories. In every case, report verifiable facts, identify uncertainty, submit only lawfully obtained records, and avoid treating suspicion as a proven offense.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
Recommended Free Tools
