How To File An Extension For Taxes 2025. When are 2025 tax extensions due? The federal tax filing deadline (tax day) is april 15, 2025, with an extension deadline of october 15, 2025.
You must file an extension by april 15,. Residents of maine and massachusetts have until april 17, 2025 to file and pay their taxes because of the patriot’s day and emancipation day holidays in these states.