Deadline extended! The state-collected sales tax filing and payment deadline for January 2026 has been extended to March 2, 2026.
Secretary of State's Checklist for New Businesses
Sales & Use Tax Forms
Withholding/Payroll Tax Forms
All Tax Forms - Forms Listed by Tax Type
Colorado Sales Tax Guide
Sales Tax Account & License
Filing & Remitting Sales Tax
Look-Up Sales & Use Tax Rates
Special Event Sales Tax
Sales & Use Tax Guidance Publications
Consumer Use Tax General Information
Use Tax Reporting Requirements
Use Tax for Businesses
