Cal. Rev. & Tax. Code § 30480

Notwithstanding any other provision of this part, any person who violates this part with intent to defeat or evade the determination of an amount due required by law to be made is guilty of a felony when the amount of tax liability aggregates twenty-five thousand dollars ($25,000) or more in any 12-consecutive-month period. The determination shall be approved by the executive director or his or her designee. Each offense shall be punished by a fine of not less than five thousand dollars ($5,000) and not more than twenty thousand dollars ($20,000), or imprisonment for 16 months, two years, or three years, or by both the fine and imprisonment in the discretion of the court.