Tax Extension Deadline 2025 Form 2025. You file by october 15, 2025 provided you filed an extension and paid your tax bill by april 15, 2025, or you're getting a tax refund. Form 8809, application for extension of time to file information returns.

Most taxpayers who requested an extension of time to file their 2023 tax return must file by tuesday, oct. 15 falls on a saturday, sunday, or.