You can generally “do taxes” once the new filing season opens, which in the U.S. is usually in late January for the prior tax year, and you must file (or extend) by mid‑April.

Key dates in simple terms

  • Tax season each year runs roughly from January 1 through about April 15 , when most people prepare and file returns for the previous year.
  • The IRS typically starts accepting electronic returns in late January (often around the last 10 days of the month), which is the earliest most people can actually file and get processed.
  • The standard federal Tax Day is April 15 ; if it falls on a weekend or holiday, the deadline moves to the next business day.

So, when can you start?

Think of it in two layers:

  1. Practically, at home
    • You can start “doing” your taxes (gathering forms, using software, filling things out) as soon as you have your documents.
    • Employers and banks usually must send W‑2s, 1099s, etc., by late January or very early February , so that is when most people really get going.
  1. Officially, with the IRS
    • Your return can be filed once the IRS opens filing for that year, normally late January.
 * If you’re expecting a refund, filing as soon as that window opens usually means you get your money sooner.

Deadlines and extensions

  • If you don’t file by mid‑April , you can usually request an extension to push your filing deadline to mid‑October , but any tax owed is still due by the April deadline.
  • Some states have different deadlines, so it’s important to check your specific state’s rules.

Quick checklist before you start

  • Wait until you have:
    • W‑2 from each employer
    • 1099s (interest, dividends, contract work, etc.)
    • Mortgage interest, tuition, or other deduction/credit forms
  • Decide whether to:
    • Use tax software
    • Go to a preparer
    • Or file manually (less common now)

Bottom line: You can prepare anytime once you have the paperwork, but you can usually file once the IRS opens in late January, and you should be done by mid‑April for that tax year.

Note: This is general U.S. info. If you’re in another country or want the exact dates for a specific tax year, say your country and year and it can be narrowed down further.