Source: L. 65: p. 1131, § 2. C.R.S. 1963: § 138-9-1. L. 72: p. 620, § 164. L. 77: Entire section amended, p. 841, § 2, effective July 1; entire section amended, pp. 1766, 1852, §§ 1, 3, effective January 1, 1978. L. 79: Entire section amended, p. 1499, § 20, effective January 1, 1980. L. 86: Entire section amended, p. 1109, § 3, effective July 1. L. 87: Entire section amended, p. 486, § 31, effective July 1. L. 89: (1) amended, p. 1594, § 4, effective July 1, 1993. L. 90: (1) amended, p. 1721, § 1, effective May 1; (1) amended, p. 1721, § 2, effective July 1, 1993. L. 93: (2) amended, p. 1239, § 14, effective July 1. L. 2001: (3) added, p. 777, § 7, effective June 1. L. 2004: (4) added, p. 399, § 1, effective August 4. L. 2005: (1) amended, p. 911, § 13, effective June 2; (1) amended, p. 926, § 14, effective June 2. L. 2009: (3) repealed, (HB 09-1053), ch. 159, p. 689, § 10, effective August 5. L. 2014: (1) amended and (5) and (6) added, (HB 14-1107), ch. 134, p. 465, § 2, effective April 25. L. 2015: (1) amended, (SB 15-264), ch. 259, p. 967, § 90, effective August 5. L. 2018: (1) amended, (HB 18-1025), ch. 152, p. 1081, § 19, effective October 1; (2) amended, (HB 18-1024), ch. 26, p. 325, § 22, effective October 1. L. 2021: (7) added, (SB 21-260), ch. 250, p. 1401, § 12, effective June 17.
Editor's note: Amendments to this section by House Bill 77-1076 harmonized with Senate Bill 77-100 and Senate Bill 77-1448.
Cross references: (1) For the legislative declaration contained in the 2005 act amending subsection (1), see section 1 of chapter 241, Session Laws of Colorado 2005.
(2) For the legislative declaration in SB 21-260, see section 1 of chapter 250, Session Laws of Colorado 2021.
Structure Colorado Code
Article 21 - Procedure and Administration
§ 39-21-104. Rejection of Claims
§ 39-21-104.5. Frivolous Submissions
§ 39-21-105.5. Notice - First-Class Mail - Definition
§ 39-21-109. Interest on Underpayment, Nonpayment, or Extensions of Time for Payment of Tax
§ 39-21-110. Interest on Overpayments
§ 39-21-110.5. Rate of Interest to Be Fixed
§ 39-21-111. Jeopardy Assessment and Demands
§ 39-21-112. Duties and Powers of Executive Director
§ 39-21-113. Reports and Returns - Rule
§ 39-21-114. Methods of Enforcing Collection
§ 39-21-114.5. Surrender of Property Subject to Levy - Definition
§ 39-21-115. Reciprocity With Other States for Collection of Taxes Provided
§ 39-21-116. Closing Agreements
§ 39-21-116.5. Penalties - Repeal
§ 39-21-118. Criminal Penalties - Repeal
§ 39-21-119. Filing With Executive Director - When Deemed to Have Been Made
§ 39-21-120. Signature and Filing Alternatives for Tax Returns