- When do I need to submit my tax return?
If you’re self-employed or a director of a limited company, you must submit a Self Assessment tax return each year. The deadline for filing online returns is 31 January following the end of the tax year (which runs from 6 April to 5 April). For example, the 2024/25 return is due by 31 January 2026. Paper returns are due earlier—by 31 October.