Cal. Rev. & Tax. Code § 19173
(b) If a material advisor fails to meet the requirements of subdivision (d) of Section 18648 with respect to a listed transaction, as defined in Section 6707A(c)(2) of the Internal Revenue Code, an additional penalty shall be imposed equal to the greater of:
(e)
(1) The Chief Counsel of the Franchise Tax Board may rescind all or any portion of any penalty imposed by this section with respect to a list required to be maintained or provided under Section 18648, if all of the following apply: