Important Numbers
Tax Questions and Assistance - toll free (866) 859-2254, (in Helena, (406) 444-6900)
Forms Request - toll free (866) 859-2254, (in Helena, 444-6900)
For the Hearing Impaired - (406) 444-2830
Fax - (406) 444-6642
If you have a refund or no payment due:
Montana Department of Revenue
PO Box 6577
Helena, MT 59604-6577
If you are sending a payment and voucher:
Montana Department of Revenue
PO Box 6308
Helena, MT 59604-6308
To email, visit the Montana Department of Revenue website.