Business Filing Services
Electronic Funds Transfer (EFT) -- Register and make electronic payments for more than 50 types of business and personal taxes.
Local Sales Tax Rates -- Find the rates for any local jurisdiction in Colorado.
Local Taxes by Address -- Links are provided to companies that display tax rates by street number, street name, city and zip code address information.
Retailers Sales Tax Rates -- With a Colorado sales tax license number, see the tax rates at the specific business location(s).
Sales Tax Account History -- See your Colorado business tax account payments back to 2002.
Sales Tax License Verification -- Confirm whether a Colorado sales tax license or sales tax exemption certificate is valid.
Sales Tax Rate Charts -- Enter a tax rate and this system will calculate sales taxes on sales from .01 to 100 dollars for the rate entered.
Sales Tax ZeroFile System -- File a Colorado Sales Tax form (DR 0100) online for state and state-collected local sales tax when you have zero net sales (line 3 of form DR 0100) and no tax due. For retailers with only one location.
Withholding Tax ZeroFile System -- Colorado employers must report wage withholding even if they have zero tax for a specific filing period. Avoid nonfiler notices when you owe no tax by filing a zero return online.
Wage Withholding Online System -- for businesses and employers to exchange W-2 data with the Colorado Department of Revenue (DOR)