Cal. Rev. & Tax. Code § 60707

Notwithstanding any other provision of this part, any person who willfully evades or attempts in any manner to evade or defeat the payment of the tax imposed by this part 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. 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, or two, or three years, or both the fine and imprisonment in the discretion of the court.