Cal. Rev. & Tax. Code § 24676.5
(b) For purposes of this section—
(5) A sale of a magazine, paperback, or record is a qualified sale if—
(6) The amount excluded under this section with respect to any qualified sale shall be the lesser of—
(7)
(A) Except as provided in subparagraph (B), the term “merchandise return period” means, with respect to any taxable year—
(8) As prescribed by the Franchise Tax Board, the taxpayer may substitute, for the physical return of magazines, paperbacks, or records required by subdivision (a), certification or other evidence that the magazine, paperback, or record has not been resold and will not be resold if such evidence—
(c)
(e)
(3) At the close of each taxable year the suspense account shall be—
(A) Reduced by the excess (if any) of—
(B) Increased (but not in excess of the initial opening balance) by the excess (if any) of—
(4)
(B) In the case of any increase under paragraph (3)(B) in the account for the taxable year, an amount equal to such increase shall be included in gross income for such taxable year.
If the initial opening balance exceeds the dollar amount of returned merchandise which would have been taken into account under subdivision (a) for the taxable year preceding the first taxable year for which the election is effective if this section had applied to such preceding taxable year, then an amount equal to the amount of such excess shall be included in gross income for such first taxable year.