The deadline to file Self Assessment tax returns online with HMRC is Friday 31 January at 23:59. Despite HMRC highlighting the date each year, hundreds of thousands of taxpayers miss the deadline and file their tax returns late, potentially resulting in a penalty from HMRC.

Depending on how late the return is filed, these penalties can amount to thousands of pounds and individuals need to complete a Self Assessment tax return for the tax year 2018/19 if:

- They earned more than £2,500 from renting a property

- Their partner received Child Benefit and either of them had an annual income of more than £50,000