Cal. RTC § 7653

(a) Each person subject to the tax imposed under Section 7361, on or before February 28, 2002, shall prepare and file with the board, on forms prescribed by the board, a return showing the total number of gallons of motor vehicle fuel owned by the person on January 1, 2002, for which a tax has not been imposed under Part 2 (commencing with Section 7301) as in effect on December 31, 2001, the amount of the tax imposed, and any other information that the board deems necessary for the proper administration of this part. The return shall be accompanied by a remittance payable to the Controller in the amount of tax due.

(b) Any distributor, as defined in paragraph (3) of subdivision (b) of Section 7361, who has tax-paid motor vehicle fuel in the bulk transfer/terminal system on January 1, 2002, which was purchased prior to January 1, 2002, shall report the tax-paid gallons on the subdivision (a) return. The amount of taxes paid on the tax-paid gallons shall constitute a credit against the amount of taxes due and payable on the subdivision (a) return, or on the supplier’s January 2002 return required under Section 7651, and for each succeeding return until the credit is fully utilized.