Cal. Rev. & Tax. Code § 18898
(b)
(1) By September 1 of the second calendar year and each subsequent calendar year that the School Supplies for Homeless Children Voluntary Tax Contribution Fund appears on the tax return, the Franchise Tax Board shall do all of the following:
(c) For each calendar year, beginning with the third calendar year after the first appearance of the School Supplies for Homeless Children Voluntary Tax Contribution Fund on the personal income tax return, the Franchise Tax Board shall adjust, on or before September 1 of that calendar year, the minimum contribution amount specified in subdivision (b) as follows: