Deadline extended! The state-collected sales tax filing and payment deadline for January 2026 has been extended to March 2, 2026.

 
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DR 1305 - Gross Conservation Easement Schedule

The appropriate parts of the DR 1305 form series must be included with your Colorado income tax return each year you have activity regarding a gross conservation easement credit or remaining addback of a related federal charitable deduction. A jointly filing couple should only submit one form.