TAP users may experience system interruptions Saturday, July 24th from 3:00 a.m. until 10:30a.m. and Sunday, July 27th from 3:00 a.m. until 9:00 a.m.
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