Colo. Rev. Stat. § 15-1.2-405
(1) To the extent a fiduciary does not account for the management of rental property as a business under section 15-1.2-403, the fiduciary shall allocate to income an amount received as rent of real or personal property, including an amount received for cancellation or renewal of a lease. An amount received as a refundable deposit, including a security deposit or a deposit that is to be applied as rent for future periods:
Source: L. 2021: Entire article added, (SB 21-171), ch. 143, p. 824, § 1, effective January 1, 2022.