Tax Return Deadline Uk 2024. We don’t just mean the actual date itself either; The deadline for submitting your 2023/24 tax return on paper is 31 october 2024, while those filing online have until 31 january 2025.

The self assessment tax return deadline is on 31 january each year. Even though you may not have introduced your new partner to all your friends and family — if you live together, the ato wants you to declare it on your tax return.