When Is Tax Deadline 2025 Uk. Deadline for submitting an online return if you’re doing an online tax return, you must submit it. With the 2025/26 tax year beginning in april 2025, it’s a good time to review important deadlines.
The dates for vat returns in the 2025/26 tax year depend on the quarter end but typically fall on: The tax year in the uk typically runs from 6 april to 5 april of the following year.