The last day to send in federal income tax forms for individual income tax returns for the 2024 tax year is April 15, 2025. If April 15 falls on a weekend or federal holiday, the deadline is extended to the next business day. For 2025, April 15 is a Tuesday, so the deadline remains April 15. You can request an extension to file until October 15, 2025, by filing Form 4868, but any taxes owed must still be paid by April 15 to avoid penalties and interest. If you file for an extension, the extended deadline to submit the return is October 15, 2025.
For mailing paper returns, the IRS will consider your return on time if it is postmarked by April 15, 2025. For e-filers, returns must be transmitted by 11:59 p.m. local time on April 15, 2025.
