Forms by Tax Year 2024

Paper (1D) Specifications Document:

e-File (2D) Specifications Documents:

Interactive PDFs:
CDOR posts interactive PDFs for each form uploaded on the Tax Grid. The interactive PDF will have layers that Software Form Developers can turn on and off in Adobe Acrobat Reader or Professional. Depending on what layer is needed, users can toggle the layers to match their needs. The layers that will be included in the PDF are:

The layers panel is on the left side. Clicking the paper stack will show 3 layers. Red X, Document and Grid.

Do Not Release Colorado Tax Forms in your software before the Release Date posted on the tax grid below. Any forms made available prior to the Release Date noted in the tax grid below, will not read in our system.


Column Descriptions

A list of some or all of the changes that have been made to the forms.

Colorado Tax Forms by Tax Year Spreadsheet
This spreadsheet can be opened in to its own window.  Hover your mouse over the sheet for the pop-out icon. Click the icon and the sheet will open in its own window.

Image of pop-out icon.

The following identifies the meanings of the Title column colors. 

Note forms that have not had a Draft posted will also appear in red. Make sure to check the "Submit No Later Than" date to determine when the form is due by.

Yellow the Form Status is draft. Gray or White the Form Status is final. Red the Submit No Later Than has passed. Blue the Form Status was final, however, the form required an update after final approval.

A blank page is required for any form and/or instructions with an odd number of pages. For more information, see our FAQ


Untitled spreadsheet