Depending on the type of complaint, the Internal Revenue Service (IRS) requires a person to fill out the applicable form and then send it by mail or fax. There are several types of complaints, such as reporting noncompliance with tax laws, identity theft, fraudulent tax activity by a tax preparer, abusive tax promotion and wrongdoing by an exempt organization. A taxpayer can also file a complaint against the IRS for misconduct of its employees.

Tax Laws Noncompliance

If a person suspects abuse of tax laws such as claiming false exemptions, kickbacks, false or altered documents, failure to pay tax or organized crime, he should report this activity to the IRS by filling out Form 3949-A and mailing it to the address indicated on the form.

Identity Theft

If a taxpayer suspects his identity, such as his Social Security number (SSN), has been stolen, he should use Form 14039, and send it to the IRS by either faxing it or mailing it using the contact information on page 2 of the form. Taxpayers should also attach documents that verify their identity in the package.

Fraudulent Tax Activity by Tax Preparer

If a person learns about any fraudulent activity or abusive tax scheme by his tax return preparer, he should report such illegal actions to the IRS by filling out Form 14157 and mailing it to the IRS using the address provided on the form.

Abusive Tax Promotion

If a taxpayer suspects an abusive tax promotion or promoter, he should fill out Form 14242, and fax or mail the form using the contact information provided.

Wrongdoing by Exempt Organization

If an exempt organization or employee plan commits misconduct or wrongdoing, a person who is aware of such activity should fill out Form 13909, and mail it to the address provided on the form.

Misconduct by IRS

Any misconduct by IRS employees, such as false statements and discrimination, can be reported by a taxpayer by writing a complaint letter and sending it to the operations director of the civil rights division of the IRS.

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