Delinquent tax refers to a tax that is unpaid after the payment due date. Usually a penalty is attached to a delinquent tax. The power, jurisdiction and authority to collect all delinquent taxes are vested in the state tax commission.
An action to recover delinquent taxes is not an action upon a contract, obligation, or liability, not founded upon an instrument in writing, but is one which arises upon a liability created by statute, other than a penalty or forfeiture. [County of Los Angeles v. Ballerino, 99 Cal. 593 (Cal. 1893)].