Montana ACH Credit Payment Registration (Form ETR)

Phone: (406) 444-6900

TDD: Montana Relay 711

We’re available Monday through Thursday, 9:00 a.m. until 4:00 pm and Friday, 9:00 a.m. until 1:00 p.m.

If you need help working with the department or figuring out our audit, appeals, or relief processes, the Taxpayer Advocate can help.

Mail: 125 N Roberts Street Helena, MT, 59601

Phone: (406) 444-6789

TDD: Montana Relay 711

Fax: (406) 444-3696

Email: DORTaxpayerAdvocate@mt.gov