The deadline for filing a Self Assessment tax return in the UK depends on how you choose to submit it:
Online submission: The deadline for filing a Self Assessment tax return online is midnight on 31 January following the end of the tax year. For example, for the tax year 2021/22 (6 April 2021 to 5 April 2022), the deadline for online submission is midnight on 31 January 2023.
Paper submission: If you choose to submit your tax return by post, the deadline is earlier, typically in October. For example, for the tax year 2021/22, the paper filing deadline is 31 October 2022.
It's important to note that the deadlines may be subject to change, so it's always a good idea to check the current deadline with HM Revenue and Customs (HMRC) or a tax professional. It's also important to file your tax return on time to avoid penalties and interest charges.
