Please remember that you must claim the state sales tax refund (TABOR refund) when filing your state income tax return. If you claimed a 2023 refund, the TABOR refund will be combined and issued out with your refund. Unlike the 2022 Colorado cashback, no separate check will be issued. 


Income Tax Forms Archive


The forms listed below are only valid for tax years 2017 and prior. When filing for a prior year, be sure to only use the versions of forms that apply to that tax year. Additionally, prior year forms cannot be used for the current tax year.


C Corporation Income

Fiduciary Income

Individual Income

Partnership & S Corporation Income


If you are looking for a prior year for a tax year that is not listed above, please visit the Forms by Tax Type web page to search for a form. If you need additional forms assistance, please email