You can start filing your 2025 U.S. federal income taxes in late January 2026, and the deadline to file without an extension is April 15, 2026.

Key 2025 tax filing dates

  • The IRS opens “tax season” each year when it starts accepting e-filed returns, typically in the last week of January.
  • For the 2025 tax year (filed in 2026), Tax Day is April 15, 2026 for most calendar-year individual filers.
  • You can request an automatic extension to file (usually to October 15, 2026), but any tax you owe is still generally due by April 15, 2026.

What “start filing” really means

  • “When do we start filing taxes for 2025?” usually refers to the first day the IRS accepts 2025 returns , which falls in that late-January opening window.
  • Many tax software platforms let you prepare your return earlier, but it will not be transmitted to the IRS until the official opening date.

Practical tips before tax season opens

  • Gather W‑2s, 1099s, investment statements, and last year’s return so you can file as soon as e-filing opens.
  • Check for any IRS announcements or updates in early January 2026 in case opening dates or deadlines shift due to holidays or emergencies.

Meta description (SEO):
Learn when you can start filing taxes for 2025, the key 2025–2026 IRS dates, and how the late-January tax season opening and April 15, 2026 deadline affect your filing plans.

Information gathered from public forums or data available on the internet and portrayed here.