DOR Taxation web site

C-Corporation Income

Technical Support:

Corporate E-file Software Developer Information 
Colorado's corporate e-file program follows the rules and guidelines established by the  Internal Revenue Service  in their Publication 4164 (Modernized e-file). Below are links to our XML schema and other documentation that can be used by software developers for Colorado Form 112 corporate e-file. Requests for the Colorado test package and questions can be directed to Steve Asbell at 303-866-3889 or by email.

2013 Software Developer Tax Forms and Information

2012 Software Developer Tax Forms and Information