Great Falls MT Tax Office 11 5th St. N. 59401 – IRS Tax Office

Great Falls MT Tax Office is here to help if you need to resolve a tax problem, have questions about how the tax law applies to your individual tax return, or you’re more comfortable talking with someone face-to-face, no appointment is necessary.

IRS Tax Office Great Falls 11 5th St. N.
Great Falls, MT 59401
Monday-Friday – 8:30 a.m.- 4:30 p.m.
(Closed for lunch 11:30 a.m. – 12:30 p.m.)
(406) 761-8095
County Tax Office Cascade Great Falls Mailing:
300 Central Ave. Suite 520

Great Falls, MT 59401-3127 


300 Central Ave. Suite 520
Great Falls, MT 59401-3127

Phone #
(406) 454-7460

Fax #
(406) 454-7498
8-5 M-F


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