California gives you an automatic filing extension through October 15. You don't need to apply for one. Here's what you should do if you can't file by April 15:
You are Due a RefundFile your return by October 15. Choose e-file and direct deposit for the fastest refund.
You Have a Balance DuePay the amount you owe by April 15 to avoid penalties and interest. You can pay online, by credit card, or by check. Then file your return by October 15. Choose e-file to ensure that we receive your return on time.
You're Not Sure if You Have a Balance DueUse the worksheet on Form FTB 3519 figure your tax.