Revenue and Taxation Code section 55225
(a)
In the case of a refund, to the last day of the monthly period following the date upon which the claimant, if he or she has not already filed a claim, is notified by the board that a claim may be filed or the date upon which the claim is approved by the board, whichever date is earlier.(b)
In the case of a credit, to the same date as to that to which interest is computed on the fee or amount against which the credit is applied.
Source:
Section 55225, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=RTC§ionNum=55225.
(accessed May 9, 2025).