If you cannot file by the due date of your return, then you can request an extension of time to file. However, an extension of time to file is not an extension of time to pay. You will owe interest on any past-due tax and you may be subject to a late-payment penalty if timely payment is not made. To receive an automatic 6-month extension of time to file your return, you can file Form 4868 (PDF), Application for Automatic Extension of Time to File U.S. Individual Income Tax Return, by the due date of your return. For more information, refer to the Form 4868 instructions.