UK Self Assessment deadline: 5.65 million still haven’t filed, HMRC warns
London, Jan 6, 2026, 12:16 GMT Britain’s tax authority said 5.65 million people still need to file their Self Assessment tax return with less than a month to go before the Jan. 31 deadline. More than 6.36 million have already submitted a return, HM Revenue & Customs said on Monday. (Gov) The filing date matters because it is also the…