April 18, 2023, marks the deadline for filing your federal income tax return, as well as the cutoff for requesting a six-month extension by submitting Form 4868. If you're wondering when taxes are due in your state, note that most taxpayers are subject to state income taxes, which typically share the same due date as the federal tax deadline. Nonetheless, for US citizens residing outside of the country, the deadline automatically extends for two months until June 15, 2023.