This portion of the Web site offers information specifically geared toward Tax Professionals.
New: Tax Relief Filing Details for Colorado Flood Victims
Filing Assistance. E-file information.
Online Services. Electronic filing options and account research systems.
Bills and Notices
Research a bill through the Individual Income Tax Return Adjustment Reasons Web page
Forms, Publications and Workshops
Forms, Publications and Reference. Links to FYIs, newsletters, forms, Tax Information Index, Tax InfoEmail Program and other information pages.
Classes and Seminars. Listing of the current live or online classes we offer with CPE credit.
Common Filing Errors and Tips
Contact Information for Assistance
Get Connected - Get Connected to the Colorado Taxation Division and get news and information now through our Weblog, InfoEmail Subscription Program and RSS Feeds.
Helpful Tips for Taxpayers to Avoid Tax Scams