Individuals

If you’re a U.S. citizen or resident alien living and working (or on military duty) outside the United States and Puerto Rico, file Form 1040 or Form 1040-SR and pay any tax, interest, and penalties due. Otherwise, see April 18.

If you want additional time to file your return, file Form 4868 to obtain 4 additional months to file and pay what you estimate you owe in tax to avoid penalties and interest. Then, file Form 1040 or Form 1040-SR by October 17.  However, if you’re a participant in a combat zone, you may be able to further extend the filing deadline. See IRS Publication 3 (Armed Forces' Tax Guide).