You don't . There is no form to apply for a CA state extension. The State of California will grant you an automatic filing extension as long as your tax balance is paid by the original deadline (April 15). Therefore, if you owe zero California income tax or you’re due a state tax refund, you don’t have to do anything in order to receive a California extension.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"