Cal. Rev. & Tax. Code § 8126

If the department determines that any amount not required to be paid under this part has been paid by any person to the state, the department shall set forth that fact in its records and certify the amount collected in excess of the amount legally due and the person from whom it was collected and certify the amount to the Controller for credit or refund. Any determination by the department pursuant to this section with respect to an amount in excess of fifty thousand dollars ($50,000) shall be available as a public record for at least 10 days after the effective date of that determination.