Cal. Unemp. Ins. Code § 1233
(a) If an employing unit’s failure to make a timely return or payment is due to the person’s reasonable reliance on written advice from the department, the employing unit may be relieved of the taxes assessed, or any interest, additions to tax, or penalties added thereto, as follows:
(b) For purposes of subdivision (a), relief shall be granted if all of the following conditions are satisfied:
(5) The tax consequences expressed in the department’s written advice were not subsequently changed by any of the following:
(c) Any person seeking relief under this section shall file with the department all of the following: