Call our Citizen Services Call Center for assistance with your individual, nonresident, or business tax questions. Our hours of service are Monday through Friday, 8 a.m. to 5 p.m. (Mountain Time).

Toll-Free - 1 (866) 859-2254

Helena (Local) - (406) 444-6900

Telephone Device for the Deaf - TDD - (406) 444-2830