Almost one million taxpayers missed the Jan 31 annual tax return deadline this year, triggering immediate fines of close to £100m.
In total 958,296 people failed to submit their self-assessment tax returns on time, according to HM Revenue & Customs (HMRC).
Nearly 12 million people were required to square their affairs with the tax authority by midnight on 31st january, with more than 700,000 waiting until deadline day to file.
