Cal. Unemployment Insurance Code § 1116

(a) (1) Every employing unit except a domestic or foreign corporation or a domestic or foreign limited liability company shall, within 10 days of quitting business, file with the director a final return and report of wages of its workers, in such form and containing such information as the director prescribes. (2) Every domestic corporation and domestic limited liability company shall, within 10 days of quitting business or within 10 days of the commencement of proceedings to wind up its affairs and voluntarily dissolve, whichever expires the earlier, file with the director a return and a report of wages of its workers, in such form and containing such information as the director prescribes. (3) Every foreign corporation and foreign limited liability company shall, within 10 days of quitting business or within 10 days of the surrender of its right to engage in business of this state in accordance with Section 2112 and subdivision (d) of Section 2114 of the Corporations Code for foreign corporations or Section 17708.08 of the Corporations Code for foreign limited liability companies, whichever expires the earlier, file with the director a final return and report of wages of its workers, in such form and containing such information as the director prescribes. (4) As used in this section, “quitting business” does not include any change in the form or membership of an employing unit if before and after such change 50 percent or more of the control of management is held by the same individual, or is held by an individual before death and after the individual’s death by the individual’s estate or heirs. (b) Contributions with respect to a return required under subdivision (a) are due and payable on the first day of the applicable 10-day period established pursuant to subdivision (a) and shall become delinquent if not paid within 10 days of the due date. (c) The director for good cause may extend for not to exceed 30 days the time for making a return or paying without penalty or interest any amount required to be paid under this section.