Cal. Rev. & Tax. Code § 4707

Should any tax or assessment which was apportioned at the time of levy be changed by correction, cancellation or refund authorized by Part 9 of Division 1 of this code, a pro rata adjustment for the amount of such change shall be made in each of the funds to which apportionment previously has been made. The total pro rata adjustments of amounts previously apportioned shall be entered on the apportioned tax resources accounts of the auditor and the treasurer. The total amount of the changes shall be entered on the secured taxes receivable accounts of the auditor.