Tax Return Deadline 2025 Uk. The deadline for filing a 2023 to 2025 paper return is 31 october 2025. January 31st marks the first deadline of 2025, in which hmrc must receive your online tax return before midnight for the tax year starting 6th april 2022 and finishing 5th april.
The deadline for filing a 2023 to 2025 paper return is 31 october 2025. For instance, for the tax year running from 6 april 2023 to 5 april 2025, your deadline is october, 5 2025.