You can usually file your federal income taxes as soon as the IRS opens “tax season,” which is typically in late January, and you must file by Tax Day in mid‑April unless you get an extension. For the return you’ll file in 2026 (covering the 2025 tax year), the deadline is expected to be April 15, 2026, with e‑filed extension returns due in October 2026.

Quick Scoop

  • Typical filing window:
    • IRS starts accepting individual returns in late January each year.
* “Tax Day” is usually _April 15_ for calendar‑year filers.
  • For taxes filed in 2026 (tax year 2025):
    • Last day to file without an extension is April 15, 2026.
* Extended returns (if you file Form 4868) are generally due in **October 2026**.
  • You don’t have to wait for April:
    • As soon as the IRS opens e‑filing in late January and you have all your forms (W‑2s, 1099s, etc.), you can file.
* Filing early can reduce stress and may help protect against identity‑theft refund fraud.

Mini Sections

When tax season starts

Most years, the IRS announces an official date in January when it will begin accepting returns, usually in the last half of January.

Tax prep sites and software let you start entering info earlier, but they queue your return to submit once the IRS systems open.

Key dates for 2026

For the 2025 tax year return you’ll file in 2026, current guidance points to:

  • Late January 2026: IRS begins accepting 2025 individual returns
  • April 15, 2026: Regular filing and payment deadline
  • October 2026: Final deadline if you requested an extension

Business filers and those with special situations (like fiscal‑year corporations or certain state rules) can have different deadlines.

A quick “when can I file” checklist

You can go ahead and file as soon as:

  1. You have all income forms (W‑2s, 1099s, etc.).
  2. You know whether you’ll claim the standard deduction or itemize.
  3. You’ve checked for any big life changes (marriage, kids, home purchase) that affect your return.

If something is missing (like a late 1099), it’s often better to wait than to file an amended return later.

“Tax season” is not just one day in April – it’s a roughly three‑month window from late January to mid‑April when filing is open and you can choose to file as early as you’re ready.

TL;DR: You can usually file as soon as the IRS opens e‑filing in late January, and for the 2025 taxes you’ll file in 2026, the main deadline is April 15, 2026, with possible extension into October.

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