Important Numbers Tax Questions and Assistance - toll free (866) 859-2254, (in Helena, 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.
