Tax Return Deadline Uk 2024. — 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. — the deadlines in the uk tax year include the 6th of april which marks the start of the tax year and payment, registration and submission deadlines on 31st july,.
Any companies with a financial year ending on 31st march 2024 must file a corporation tax return by 31st. — january 31 is the deadline for online tax returns to be completed.