Embedded Files
07/30/26 - LOI has been updated. 08/11/26 - Paper specifications have been released
Here you will find the most current announcements for the 2026 Tax Season. Updates are posted newest to oldest and include the date in the title.
To expand the announcement, click the down arrow/caret (∨) to the right of the title.
09/04/26 - Notification of Form Postings
Hello,
This email is to notify you that the following forms have been posted. Visit the Tax Forms By Year Page (access page here) and select the current tax year, to access the tax grid spreadsheet.
Final:
The following forms are now being accepted for Substitute Form Review
DR 0104BEP
DR 0104EP
DR 0105
DR 0105EP
DR 1016EP
DR 0112EP
DR 0145 - Should be treated as a new form.
DR 0154 - Should be treated as a new form.
DR 0155 - Should be treated as a new form.
DR 1102 - Should be treated as a new form.
DR 1108 - Should be treated as a new form.
Please let us know if you have any questions.
Thank you,
Substitute Form Developer Review Team
09/04/26 - DR 1093 & DR 1094
Hello All,
The DR 1093 & DR 1094 has not been updated this year and will not require a review if already approved from previous years.
Please let us know if you have any questions.
Thank you,
Substitute Form Developer Review Team
08/31/26 - Urgent! Early Release of DR 0106K
Hello Everyone,
Colorado received a 2026 version of the DR 0106K with a reversion date of 07/09/26, using the CDOR 9999 vendor ID. The revision date does not match this year or last year.
This form has not been released for replication. Nor, is it being accepted for taxpayer submission until January of 2027. Please check your systems to make sure a 2026 version of the DR 0106K has not been released to the public.
Please let us know if you have any questions.
Thank you,
07/30/26 - LOI Updated
Hello Everyone,
We have updated the LOI to correct the following:
In the "MeF Forms" table, the estimated payment form for partnerships and S corporations has been updated to reflect the correct form number:
"DR 0106EP – Colorado Partnership and S Corporation Estimated Tax Payment Form"
For any vendors that have already submitted a 2026 LOI and who have indicated that they will support estimated payments for pass-through entities, our team will verify the responses and make any necessary corrections on our end.
Please let us know if you have any questions.
Thank you,
Substitute Form Developer Review Team
07/27/26 - LOI
Hello All,
The Colorado Letter of Intent (LOI) has been released!
The LOI PDF is attached to this email. It can also be found on the Colorado Substitute Form Developer website.
Finalized forms will begin to be posted on the website beginning in September.
Please let us know if you have any questions.
Thank you,
07/08/25 - The 2026 page is under construction
Thank You,
Colorado Department of Revenue Taxation Division
Page updated
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