What is the deadline for submitting an online self-assessment tax return for the 2020/21 tax year?

The deadline for submitting an online self-assessment tax return for the 2020/21 tax year is indeed 31 January 2022. The UK tax year runs from 6 April of one year to 5 April of the following year, which means the 2020/21 tax year covers the period from 6 April 2020 to 5 April 2021.

When individuals are completing their self-assessment tax returns online, the deadline typically falls on the last day of January following the end of the tax year. Therefore, for the 2020/21 tax year, the submission deadline is January 31, 2022. This timing allows taxpayers adequate opportunity to compile their financial information and report their income, gains, and deductions accurately.

In contrast, the other dates do not correspond with the established deadlines: 31 December 2021 is too early for online submissions, while 31 October 2021 is the deadline for paper returns, and 30 September 2021 does not align with any relevant tax return submission deadlines for that tax year. Therefore, understanding these deadlines is crucial for tax compliance and avoiding potential penalties.