08/30/24 - The LOI has been released. Download the zip folder not just the Word doc. Forms will begin to be released by September 6, 2024.

Forms by Tax Year 2023

08/28/23 - The first set of forms have been release for replication.

11/09/23 - 2D Developer Test Package for 2023 has been released.

2023 1D and 2D Specifications Documents:

Submission Guidelines:

To avoid returns or rejections, ensure all submissions meet the following criteria:

The form is complete, in numerical order (page 1, 2, 3...)
Contains the correct number of samples with variable realistic dummy data
Variable data matches the expected formatting

(CAN, FEIN, ITIN, SSN, Dates, etc...)

Variable data does not contain “xxx” or “999”

(We cannot use x or 9’s for testing)

The revision date matches the provided tax sample form
Form status is marked as “Final"

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:

Red X layer - Shows text safe area for variable data. Can be toggled
Document layer - This is the form and is locked so that it always shows
Grid layer - The 6x10 grid. Can be toggled
Draft Stamp layer - Only included on drafts to indicate the form is not finalized

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

Form #
Colorado Department of Revenue assigned DR number.
Title
The title of the form.
Revision Date
The latest revision date of the form.
Date Posted
The date the form was posted to the web page.
Status
Indicates whether the form is "Draft", "Final" or "Final Updated".
- Draft form templates are posted as an example of a form however this version is not accepted as a form for review by Colorado. Only Final versions are accepted.
- Final form templates are the versions of forms vendors must use as an example for their software.
- Final Updated form templates that were previously final and has been corrected.
Submit No Later Than
The last date a form may be submitted to Colorado for review and approval. Forms that are submitted after the submit no later than, due date and/or are not on the current year's list of required forms to be reviewed, are subject to being placed on hold. The 10 business days to complete the review will no longer apply. These forms may be reviewed at the earliest convenience of the software form review team. For example, coupon forms (scan line forms) are often due by the end of September. If a vendor submits the form in November, the form may be placed on hold until January when the review season has slowed.
Date First Final
The date a form was initially approved by Colorado and had been posted as a final to the website by Colorado.
Comments
Changes or notifications about the form after the form has been posted as a final to the website.
Form Type
This is the type of form that is provided by CDOR for vendors to download. Form types are:
- Book - Book template with associated forms and instructions. A book template does not include data placement X's or a 6 x 10 grid.
- Form - Form is a blank template of the form. This template does include data placement X's and a 6 x 10 grid as layers.
Release Date or Time Frame
The time frame the form may be released by the vendors in their software. Description of each is provided below:
- Immediate - Forms that are ready for immediate update and release in the vendor software. Colorado highly encourages the update and distribution of these forms to the public as soon as possible.
- Annual - Forms that are updated annually and are not available for release to the public until January 1, 2024.
- 1/26/24 - These forms are used for January tax collections that are due on February 20th.

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.

A blank page is required for any form with an odd number of pages. See the comment section for which forms require a blank page. For more information, see our FAQ.

The following identifies the meanings of the Title column colors.

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.

Untitled spreadsheet

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