Cal. Civ. Proc. Code § 708.795

Except as to sums due and unpaid under a judgment for support, nothing in this article authorizes the filing against an overpayment of tax, penalty, or interest, or interest allowable with respect to an overpayment, under Part 10 (commencing with Section 17001), or Part 11 (commencing with Section 23001) of Division 2 of the Revenue and Taxation Code or under Division 6 (commencing with Section 13000) of the Unemployment Insurance Code.