January 31, 2023 Self-assessment deadline If you need to file a self-assessment tax return, the filing deadline line is by 31 Jan 2023. The income tax payment is also due on the same date.
January 31, 2023 Companies Accounts filing for April 2022 year end Your company or association must file a Company Tax Return if you get a ‘notice to deliver a Company Tax Return’ from HM Revenue and Customs (HMRC).