Tax Forms Guide

Tax forms for Colorado and US taxes may be found online year round via the links below:

• Revenue Online. Colorado Department of Revenue.
  • You may need to "Click Here to Start Over" from the above link if you have opened the page previously in your session.
  • File a Return: "free, one-stop site for filing your taxes, managing your account and checking the status of your refund."

Forms in PDF:

• Forms by Tax Type.
  • Individual Income Tax | Forms & Instructions
• Forms in Number Order.

Federal tax forms and forms for other states can be found online:

• Forms, Instructions & Publications.
• Forms and publications (PDF).
• File. Internal Revenue Service (IRS).
  • Filing instructions.
• Prior Year Forms and Instructions.
• Prior Year Products. Page has links to first 25 of over 15,600 files/documents from various years. Searchable by Product Number; Title, and Revision Date. Documents are in PDF format.
  • Publications Online. IRS. In html and PDF.
     
• State Tax Forms & Filing Options. Federation of Tax Administrators.