Tax Deadline 2024 Extension Date Uk. This date holds immense significance for taxpayers across the united kingdom.  — the tax return deadline for 2024 is set for 31st january.

 — you have until 11.59pm on wednesday 31 january 2024 to send hmrc an online tax return for the 2022/2023 tax year, which ended on 5 april 2023. Online submissions of your 2023/2024 tax return must be made by the end of this day.