DOR Taxation web site

Software Developers

E-File


Form Development and Design

For questions or comments regarding Forms Submission and Approval, please contact DOR_Forms_Development@state.co.us.
If the department previously approved your substitute form, and no later of that version has been posted, please do not submit the form again. Per NACTP standards all forms are required to be submitted to CDOR within 6 weeks of CDOR posting a form as Final.