Cal. Rev. & Tax. Code § 24652.5
(a)
(3)
(B)
(i) Each suspense account under Section 447(i) of the Internal Revenue Code shall be reduced (but not below zero) for each income year beginning after June 8, 1997, by an amount equal to the lesser of:
(II) Fifty percent of the net income of the corporation for the income year, or, if the corporation has no net income for that year, the amount of any net operating loss (as defined in Section 172 of the Internal Revenue Code and as modified for purposes of this part) for that income year.
For purposes of the preceding sentence, the amount of net income and net operating loss shall be determined without regard to this paragraph.