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Need Help? Citizen Services Call Center Contact Us Online Phone: (406) 444-6900 TDD: Montana Relay 711 Email: [email protected] 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. Taxpayer Advocate If you need help working with the department or figuring out our audit, appeals, or relief processes, the Taxpayer Advocate can help. Contact The Taxpayer Advocate Online Mail: 125 N Roberts Street Helena, MT, 59601 Phone: (406) 444-6789 TDD: Montana Relay 711 Fax: (406) 444-3696 Email: [email protected] Learn More About the Taxpayer Advocate