Cal. Rev. & Tax. Code § 19732

(a) For any taxpayer who meets each of the requirements of Section 19733 both of the following apply:
1. (1) The Franchise Tax Board shall waive all unpaid penalties and fees imposed by this part for each taxable year for which tax amnesty is allowed, but only to the extent of the amount of any penalty or fee that is owed as a result of previous nonreporting or underreporting of tax liabilities or prior nonpayment of any taxes previously assessed or proposed to be assessed for that taxable year.
2. (2) Except as provided in subdivision (b), no criminal action shall be brought against the taxpayer for the taxable years for which tax amnesty is allowed for the nonreporting or underreporting of tax liabilities or the nonpayment of any taxes previously assessed or proposed to be assessed.
(b) This chapter shall not apply to violations of this part, for which, as of February 1, 2005, any of the following applies:
1. (1) The taxpayer is on notice of a criminal investigation by a complaint having been filed against the taxpayer.
2. (2) The taxpayer is under criminal investigation.
3. (3) A court proceeding has already been initiated.
(c) This section shall not apply to any nonreported or underreported tax liability amounts attributable to tax shelter items that could have been reported under either the voluntary compliance initiative under Chapter 9.5 (commencing with Section 19751) or the Internal Revenue Service’s Offshore Voluntary Compliance Initiative described in Revenue Procedure 2003–11.
(d) No refund or credit shall be granted with respect to any penalty or fee paid with respect to a taxable year prior to the time the taxpayer makes a request for tax amnesty for that taxable year pursuant to Section 19733.
(e) Notwithstanding Chapter 6 (commencing with Section 19301), a taxpayer may not file a claim for refund or credit for any amounts paid in connection with the tax amnesty program under this chapter.