IRS e-file is the IRS's electronic filing program. The extension deadline to file 2023 taxes ended Oct 15, 2024.Various deadlines have been extended to May 1, 2025. Affected taxpayers in specified counties will have until Feb. 3, 2025, to file returns and pay any taxes that were originally due during this period. An extension of time to file your taxes is not an extension of time to pay any taxes you owe. Here you will find a listing of DOR tax due dates and information for filing an extension. Of time to file does not extend the amount of time you have to make your payment. The elections must be maintained in the filing entity's files. File your federal tax forms online for free.