This is the big one. April 15 is the deadline to file your federal income tax return for 2024 unless you request an extension. It's also the deadline to pay any taxes owed to avoid late payment penalties and interest. If you're making estimated payments for 2025, the first quarterly payment is also due on this day.

The IRS started accepting 2024 tax returns on Jan. 27, and the agency posted the first statistics from tax season 2025 last Friday, Feb. 7. This year's numbers show that the agency has already processed more than 11 million returns and issued more than 3.