All State Offices will be closed January 1, 2026 for New Year's Day.

 
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Tax Rules

Rulemaking Announcements

Notice of Proposed Rulemaking – Mandatory Electronic Filing and Payment of Certain Taxes and Fees and Update Sales Tax Filing Schedules

The Colorado Department of Revenue, Division of Taxation, will hold a public rulemaking hearing on the tax rules listed below at 10:00 a.m. on January 15, 2026.

SUTS Functionality Study – Final Report

We are pleased to release our final report with the recommendations resulting from our study of the Sales and Use Tax System (SUTS).  A copy of the report may be accessed below. 

Workgroup Meeting – Mandatory Electronic Filing and Payment of Certain Taxes and Fees

The Colorado Department of Revenue, Division of Taxation, is hosting a virtual workgroup meeting to discuss the promulgation of new and amended tax rules regarding mandatory electronic filing and payment of certain taxes and fees. The Department has prepared the draft rules below to aid in the process of soliciting public comments.
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