For the five consecutive income tax years immediately following the year in which the executive director files written certification with the revisor of statutes as specified in section 39-22-1001 (8) that a line on the income tax return form has become available and the family caregiver support fund voluntary contribution is next in the queue established pursuant to said section 39-22-1001 (8), the executive director shall ensure that the Colorado state individual income tax return form contains a line whereby each individual taxpayer may designate the amount of the contribution, if any, that the individual wishes to make to the family caregiver support fund created in section 39-22-4903 (1).