You can generally file your 2025 state income taxes as soon as your state’s e‑file systems open for the 2025 filing season, which usually happens in late January 2026 , around the same time the IRS starts accepting 2025 federal returns.

Quick Scoop

  • Most states open filing in late January and follow the same basic calendar as the federal season.
  • For the 2025 tax year, the federal filing deadline is April 15, 2026 , and most states align their state tax deadline with that same date.
  • A few states set different deadlines or don’t have an income tax at all, so exact dates depend on where you live.
  • You can’t really file until you have all your key forms (like W‑2s, 1099s), which employers must send by January 31, 2026 for 2025 income.

When you can actually hit “file”

You can typically file state taxes in 2026 for your 2025 income:

  1. Once:
    • Your state’s tax agency has opened its online/e‑file systems for the season (normally late January).
 * You have your federal information ready (many state returns import or mirror your federal numbers).
  1. Practically speaking, many people are ready to file between early February and early April 2026 , after all forms arrive and any federal issues are sorted out.

Deadlines vs. opening dates

  • Opening date (can file): Late January 2026 for most states, when their systems start accepting 2025 returns.
  • Regular deadline (must file by): Usually April 15, 2026 , matching the 2025 federal due date.
  • Extensions: Many states let you extend if you extend federally (Form 4868 moves your federal filing to October 15, 2026, though payments are still due in April).

State‑by‑state twist (why there’s no single date)

  • Some states don’t have an income tax (for example, a few that participate in federal Direct File but don’t require separate state filing).
  • Others have their own rules and deadlines , so state tax filing might be slightly earlier or later than the federal date.

A good rule of thumb:

Check your state department of revenue website in January 2026 for “2025 individual income tax filing season” dates and look for both “e‑file opening date” and “deadline.”

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