Colorado Revised Statutes Title 39. Taxation § 39-37-106. Administration and enforcement--disputes and refunds--rules

(3)(a) The executive director shall make a refund or allow a credit to any vendor that establishes that the vendor has overpaid the tax due pursuant to this article 37. No such refund shall be made or credit allowed in an amount greater than the tax paid.

(b) The vendor must file any claim for refund or credit under this section within three years after the due date of the return showing the overpayment. The claim must be made on forms prescribed by the executive director and must include such pertinent data, information, or documentation as the executive director may require.

(c) Upon receipt of the application and proof of the matters contained therein, the executive director shall give notice to the vendor in writing of the executive director's decision. Aggrieved vendors may petition the executive director for a hearing on the claim in the manner provided in section 39-21-104.