Colorado Department of Revenue Resources
Sales Tax Information
Sales Tax Information: Tax.Colorado.gov/sales-use-tax
Sales and Use Tax Guide: https://tax.colorado.gov/sales-use-tax-guidance-publications
Sales Tax Training: https://tax.colorado.gov/sales-tax-training
Sales Tax Webinar Registration: https://tax.colorado.gov/tax-education-webinars
Wage Withholding Information
Withholding Tax Webpage: Tax.Colorado.gov/Withholding-Tax
Withholding Tax Guide: Tax.colorado.gov/withholding-tax-guide
Withholding Tax Training: Tax.colorado.gov/withholding-training
Withholding Webinar Registration: Tax.colorado.gov/tax-education-webinars
Income Tax Information:
Individual Income Tax Webpage: https://tax.colorado.gov/individual-income-tax
Estimated Payments for Individuals: https://tax.colorado.gov/individual-income-tax-estimated-payments
Business Income Tax Webpage: https://tax.colorado.gov/business-income-tax
Estimated Payments for Businesses: https://tax.colorado.gov/business-income-tax-estimated-payments
Additional Information:
Destination Sourcing: www.youtube.com/watch?v=iRdgrA2ov0k
Marketplaces: Tax.Colorado.gov/Marketplaces
Due Date Guide: https://tax.colorado.gov/due-date-guide
Sales Tax Filing Frequency and Due Dates: https://tax.colorado.gov/sales-tax-filing-information
Wage Withholding Filing Frequency and Due Dates: https://tax.colorado.gov/withholding-filing-frequency-due-dates
Special Events Webpage: https://tax.colorado.gov/special-event-sales-tax
Special Events Coordinator Contact Information: DOR_SpecialEvents@state.co.us (email); 303-866-5643 (phone)
Free Online Resources:
Tax Education and Training Resources: Tax.Colorado.gov/Education
Instructional Videos: https://www.youtube.com/corevenueonline
Register for FREE Tax Training Webinars: Tax.Colorado.gov/Tax-Education-Webinars
Taxation Account Administration Portal: Colorado.gov/RevenueOnline
Revenue Online Portal Assistance: Tax.Colorado.gov/ROL-help
Links & Information for Everyone: https://sites.google.com/state.co.us/yourcolife/home
Sign up for email updates: Tax.Colorado.com/Email-Sign-Up
Contact us: Tax.Colorado.gov/Contact-Us
Visit a Service Center: Tax.Colorado.gov/Visit-A-Service-Center
Taxation Information: https://tax.colorado.gov/
SUTS (Sales & Use Tax System) Information:
SUTS Resources:
SUTS: Colorado.MuniRevs.com
SUTS Information: Tax.Colorado.gov/SUTS-Info
SUTS Help: Tax.Colorado.gov/SUTS-Help
SUTS FAQ: Tax.Colorado.gov/SUTS-FAQ
SUTS Participating Jurisdictions: Tax.Colorado.gov/SUTS-Jurisdictions
SUTS Support: Tax.Colorado.gov/SUTS-Support
SUTS Presentation Recording: Youtu.be/7L-MZKAcLWQ
SUTS Contact Information:
SUTS Support Line: 720-795-7759
Email: DOR_SUTS_Help@state.co.us
Hotlines
Taxpayer Services: 303-238-7378
Discovery: 303-205-8292
Collections: 303-205-8291
Agent in Charge: 303-866-3711