Cal. Revenue and Taxation Code § 19194

(a) Notwithstanding any other provision of this article, a voluntary disclosure agreement shall be null and void in the event that the Franchise Tax Board finds that with respect to the agreement any of the following circumstances exist: (1) The qualified entity has misrepresented any material fact in applying for the voluntary disclosure agreement or in entering into the agreement. (2) The qualified entity fails to file any returns for any taxable year covered by the voluntary disclosure period agreed upon on or before the due date prescribed under the terms of the agreement in accordance with paragraph (2) of subdivision (d) of Section 19191. (3) (A) The qualified entity fails to pay in full any tax, fee, penalty, or interest due within the time prescribed under the terms of the voluntary disclosure agreement in accordance with paragraph (2) of subdivision (d) of Section 19191 or to pay any installments thereof due within the time prescribed under the terms of an installment payment arrangement in accordance with subparagraph (B). (B) The Franchise Tax Board may enter into an installment payment arrangement, which shall include provisions for interest, in lieu of the full payment required under paragraph (2) of subdivision (d) of Section 19191. Failure by the qualified entity to comply with the terms of the installment payment arrangement shall also render the voluntary disclosure agreement null and void. (C) Notwithstanding subparagraphs (A) and (B), an applicant applying for an installment payment arrangement shall have the same time periods as identified in paragraphs (1) and (2) of subdivision (d) of Section 19008 to pay in full any tax, fee, penalty, or interest due. (4) The tax shown by the qualified entity on its tax return filed for any taxable year covered by the voluntary disclosure agreement, including any amount shown on a qualified amended return, as defined in Section 1.6664-2(c)(3) of Title 26 of the Code of Federal Regulations, understates by 10 percent or more the tax imposed under either Part 10 (commencing with Section 17001) or Part 11 (commencing with Section 23001) and the qualified entity cannot demonstrate to the satisfaction of the Franchise Tax Board that a good faith effort was made to accurately compute the tax. (5) The qualified entity fails to begin to prospectively comply with all franchise and income tax laws of this state as agreed upon under the terms of the voluntary disclosure agreement in accordance with paragraph (2) of subdivision (d) of Section 19191. (b) In the event that the Franchise Tax Board finds that the qualified entity has failed to comply under any of the circumstances which render the voluntary disclosure agreement null and void as set forth in subdivision (a), the limitation on assessment for any taxable years and the waiver of any penalties as provided for in paragraph (1) of subdivision (d) and subdivision (h) of Section 19191 shall not be binding on the Franchise Tax Board. (c) The amendments to this section made by the act adding this subdivision shall apply to voluntary disclosure agreements entered into on or after January 1, 2011.