Call the Taxpayer Helpline - (303) 238-7378
Taxpayer Service Representatives are available Monday through Friday, 8:00 a.m. to 4:30 p.m. MT (except on state holidays). Language translation service is available over the phone. Request this service once connected to a Taxpayer Service Representative.
All Service Centers and Call Center will be closed on: Wednesday, December 4, 2024 and Thursday, December 5, 2024 for System Maintenance