The deadline for submitting your 2022/23 self assessment tax return is 31 January 2024 for online returns.
If you submit your tax return after the self-assessment deadline, you will be fined £100. The penalty for late submission rises sharply after three months, and continues to climb for prolonged delays totalling up to £1,600 for an entire year, that is before calculating interest on the penalties too!
18 days to go.