Business Tax Training

Business Tax Class

Are you starting a new business? Do you need a refresher on business tax? Attend our business tax class to learn more. This class is for Colorado businesses and business tax professionals. It covers information on sales tax, special event tax, consumer use tax, wage withholding, licensing and filing tax returns. Classes are offered monthly in each of our Taxpayer Service Centers located in Fort Collins, Denver, Colorado Springs, Grand Junction and Pueblo. Visit our Public Tax Class Calendar to find and register for a live class near you. Can't make it to an in-person class? Visit our Business Tax Class web page to view a previously recorded class.

Training Publications & Resources

Sales Tax Changes Webinar

This video explains the new sales tax law implemented June 1, 2019. For more information, visit the Sales Tax Changes web page.


How to File Sales Tax

How to File Using Revenue Online
How to File Using a Paper Form
How to File Special Event Sales Tax Using Revenue Online
Vendor/Service Fee Information


Sales Tax Account Set-Up Videos

Tips for Setting Up Your Revenue Online Account
How to Find Information on Colorado Sales & Use Tax Rates
Verify Your Colorado Sales Tax License Number
How to Register in Revenue Online for Out-of-State Retailers


Wage Withholding Videos

How to Calculate Colorado Wage Withholding
How to Filie Colorado Wage Withholding Returns
Filing Frequencies & Due Dates
Colorado Wage Withholding Changes for 2020


Revenue Online Help

Resetting your Revenue Online Password
Authenticating a Browser or Device
Solving Login Issues