TAP users may experience system interruptions Saturday, August 22nd from 4:00 a.m. until 9:00 a.m. and Sunday, August 23rd from 4:00 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