2025 When Does Tax Season Start 2025. The calendar has flipped to 2025, and americans will soon be tasked with filing their tax returns for the previous year. Like last year, the 2025 tax season will begin on the last monday of january, but this year's start date is two days earlier on the calendar.
The calendar has flipped to 2025, and americans will soon be tasked with filing their tax returns for the previous year. The 2025 tax season deadline for americans to file is april 15.