headline: HMRC closes phone lines due to technical fault
text: HM Revenue and Customs (HMRC) has closed most of its phone lines due to a fault as many people seek advice ahead of filing their tax returns.
  x authority apologised for the outage and urged people to use their online services.
  It is not known when the lines will be working again, but HMRC said it would "reopen them as soon as possible".
  More than 12 million people are required to complete self-assessment tax returns before 31 January.
  umber is made up of people who are self-employed and those with more than one source of income.
  If people do not file their tax return, either online or via post, then they face being hit with a fine, which is usually £100.
  A statement from HMRC said: "Our online services are working well and we encourage people to continue using them.
  "We are working to urgently resolve a technical problem that has seen us temporarily close most of our phone lines. We apologise to people affected and will reopen them as soon as possible."
  HMRC gave people up to a month after the normal deadline of 31 January this year because the pandemic had put pressure on individuals and tax advisers to complete submissions.
  r there will be no extended deadline.