Self Assessment Tax Return 2025 2025 Online Free. Depending on how you’re employed, there are different ways to register. Final day for paper submissions of your tax return for income for tax year ending 5 april 2025.
If you’re doing an online tax return, you must submit it by midnight 31 january 2025. You have until 11.59pm on wednesday 31 january 2025 to send hmrc an online tax return for the 2023/2024 tax year, which ended on 5 april 2024.