Cal. RTC § 4831

Incorrect entries on a roll may be corrected under this article as follows:

(a) (1) Any error or omission not involving the exercise of assessor value judgment may be corrected within four years after the making of the assessment being corrected.

(2) Notwithstanding paragraph (1), the four-year limit shall not apply to escape assessments caused by the assessee’s failure to report the information required by Article 2 (commencing with Section 441) of Chapter 3 of Part 2.

(b) Any error or omission not involving the exercise of assessor value judgment that is discovered as a result of any audit may be corrected within six months after the completion of the audit.

(c) Any error or omission involving the exercise of assessor value judgment that arises solely from a failure to reflect a decline in the taxable value of real property, floating homes subject to taxation pursuant to Section 229, and manufactured homes subject to taxation under Part 13 (commencing with Section 5800), as required by paragraph (2) of subdivision (a) of Section 51 shall only be corrected within one year after the making of the assessment that is being corrected.

(d) Taxes that are not a lien or charge on the property assessed may be transferred from the secured roll to the unsecured roll of the corresponding year by the county auditor. These taxes shall be collected in the same manner as other delinquent taxes on the unsecured roll and shall be subject to delinquent penalties in the same manner as taxes transferred to the unsecured roll under Section 5090. The statute of limitations for the collection of those taxes shall commence to run from the date of transfer.