You may file Form 1040, Form 1040A or Form 1040EZ any time before the six-month extension period ends. You must make a proper estimate of your tax for the year.We give you an automatic 6-month extension to file your return. You'll receive an electronic acknowledgment once you. This gives you until October 15 to file without penalties. You can get an automatic 6-month State of California tax extension and have until October 15 to file your return. The California tax deadline extension covers tax filing and payment deadlines initially falling between January 21, 2024, and June 17, 2024. To access Form FTB 3563 in the program, from the main menu of the California return select Form CA 3563 (Automatic Extension). Fortunately, California will – under limited circumstances – allow you to request a 30-day sales tax filing extension. California automatically grants an extension of time to file.