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Tax Rules

Rulemaking Announcements

Request for Public Input – Colorado Income Tax Withholding

The Colorado Department of Revenue, Division of Taxation, is seeking public input regarding drafts of the following new and amended rules. The Department has prepared the following drafts to aid in the process of soliciting public comments.

Adopted – Alternative Transportation Options Income Tax Credit Rule

On June 2, 2025, the Colorado Department of Revenue, Division of Taxation, adopted the Alternative Transportation Options Income Tax Credit Rule. The adoption was based on the public rulemaking hearing held on January 30, 2025.

Notice of Proposed Rulemaking – Miscellaneous Tax Rules

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 July 10, 2025.
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