We are committed to the fair administration of the tax laws of this state. This means taxpayers should pay no more and no less than they owe the state of Montana.

We recognize that most taxpayers are honest and pay their fair share for the services they receive from the state.

Unfortunately, some individuals and businesses evade paying the taxes they owe. This is fraud, and it is illegal.

We need your help to find and stop this activity. We appreciate any information or tips that uncover tax fraud.

You can report suspected tax fraud using the Suspected Tax Fraud Information Referral (Form STFIR).

Please contact us regarding the suspected tax fraud using one of the following methods:

By Phone:

This call is confidential.

Call Center
(406) 444-6900
TDD
Montana Relay dial 711

By Fax

You can fax Form STFIR to us at (406) 444-6642.

By Mail

You can mail Form STFIR to us at:

Montana Department of Revenue
Attn: Compliance Unit
PO Box 7149
Helena, MT 59604-7149

The Information We Need

Please provide a description, with as specific details as possible, of the activities that you believe are fraudulent. This could include:

• The name and address of the person or business
• Individual/business address and phone number
• Marital status
• Spouse’s name
• Alleged tax violation
• The date or time period of the potential fraud
• How you became aware of the alleged violation
• Asset information (vehicles, property, etc.)
• Copies of any documents relating to the activities you are reporting (this is helpful when we review your complaint)
• Your contact information (optional)

Please use Form STFIR for providing the information listed above.

What Happens After You Report Tax Fraud

We review the information provided along with our records to see what actions we need to take.

Since taxpayer records, including investigations, are confidential, we won't be able to tell you any other steps we take. However, we might contact you if we need additional information for our investigation.

We may also share information with the IRS.