IRS AND FTB SAY ONE MORE DAY TO PAY!
IRS has allowed an additional day to file and pay taxes following IRS system issues that surfaced early on the April 17 tax deadline. Because California taxpayers must generally complete their federal return before their California return can be filed, FTB will follow federal announcement IR-2018-100, April 17, 2018. Individuals and businesses with a filing or payment due date of April 17 will now have until midnight on Wednesday, April 18th. Taxpayers do not need to do anything to receive this extra time.
California provides an automatic six-month extension to October 15th available to taxpayers who need additional time to file. Any tax due must still be paid by April 18th.