C.R.S. § 39-22-3302
39-22-3302. Voluntary contribution designation - procedure
39-22-3302. Voluntary contribution designation - procedure. For income tax years commencing on or after January 1, 2016, the Colorado state individual income tax return form must contain a line whereby each individual taxpayer may designate the amount of the contribution, if any, the individual wishes to make to the Colorado cancer fund created in section 39-22-3303.