Tax Return 2025 Deadline Uk 2025. End of the 2024/25 tax year (last. The self assessment tax deadline on 31 january 2025 is a critical date for individuals and businesses in the uk who need to report income and calculate any tax due for.

You have until 11.59pm on friday 31 january 2025 to send hmrc an online tax return for the 2023/2024 tax year, which ended on 5 april 2024. How to file a self.