Coronavirus Disease 2019 (COVID-19) in Colorado: State & National Resources

Taxation News

COVID-19 Updates

Tax filing extension information, closures and other updates related to COVID-19. Learn more >

Alternative Process of Service

You may serve your legal documents on the Department during the office closure to the public. More information >

2020 Retail Sales Tax Return is Available

The DR 0100 has changed for the 2020 tax year. See what has changed...

SOVOS is No Longer Providing Juris Codes in the Free Lookup Tool 

CDOR has free tools to look up jurisdiction codes. Learn more >

TABOR Refunds

What do Coloradans need to know about TABOR this year? Learn more >

Taxpayer Identity Verification

Did you receive an "Action Needed Letter" from the Department? Here is what you should do next...

Need extra help with your income tax return?

Many community groups and nonprofit organizations offer filing assistance for Coloradans. Learn more...

Did You Receive a Letter From Us? 

Review this FAQ to find out next steps.

Alpha Index