Business Income Tax | File Online
Businesses can file their return online through Revenue Online. However, if you are a first-time Colorado income tax filer, you must file a paper return or through an accepted tax software program. After your first tax return is processed, you may create your own Login ID and Password to use in Revenue Online. For more information, review the E-Filer Handbook or visit the Online Services web page.
Business Income Tax Services in Revenue Online