Follow the instructions on Form 4868 on Where to File the Form. We give you an automatic extension to file your return.No application is required. The California tax deadline extension covers tax filing and payment deadlines initially falling between January 21, 2024, and June 17, 2024. This gives you until October 15 to file without penalties. The tax deadline in California is Nov. 16, 2023, if you lived in a federally declared disaster area included in at least one of three different declarations. Most individuals and businesses in California will now have until Nov. 16 to file their 2022 returns and pay any tax due. The IRS has extended tax deadlines for most Californian taxpayers until November 16, 2023.