Contact Us By Email
General Tax Questions
Please allow 3-4 business weeks for an email response for general tax inquiries. For a faster response, please call the Taxpayer Helpline at (303) 238-7378.
Tax Unit Contact Emails
Excise Accounting Unit: DOR_ExciseTax@state.co.us
Fuel Tax Unit: DOR_FuelTax@state.co.us
Marijuana Tax Unit: DOR_MarijuanaTaxes@state.co.us
Criminal Tax Investigations: DOR_TaxInvestigations@state.co.us
Office of Tax Policy & Analysis: DOR_TaxPolicy@state.co.us
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