Cal. Rev. & Tax. Code § 18501
(a) Every individual taxable under Part 10 (commencing with Section 17001) shall make a return to the Franchise Tax Board, stating specifically the items of the individual’s gross income from all sources and the deductions and credits allowable, if the individual has any of the following for the taxable year:
(c) For any individual described in paragraph (1) or (2), the Franchise Tax Board shall recompute the amounts provided in subdivision (b) and paragraphs (1) to (3), inclusive, of subdivision (a) as follows:
(2) For any individual or spouses eligible to claim the credit described in subdivision (d) of Section 17054, the Franchise Tax Board shall increase the income amounts described in subdivision (b) or paragraphs (1) to (3), inclusive, of subdivision (a), as adjusted by subdivision (d), by the quotient provided by dividing each credit described in subdivision (d) of Section 17054, as adjusted in subdivision (i) of Section 17054, by the following:
(d) For each taxable year beginning on or after January 1, 1996, the Franchise Tax Board shall recompute the income amounts prescribed in paragraphs (1) to (3), inclusive, of subdivision (a) and in subdivision (b), as follows:
(2) The Franchise Tax Board shall do both of the following: