Welsh Government

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Self Assessment tax returns

HM Revenue and Customs (HMRC) must receive your tax return and any money you owe by the deadline.

The last tax year started on 6 April 2018 and ended on 5 April 2019.


  • paper tax returns, midnight 31 October 2019
  • online tax returns, midnight 31 January 2020
  • pay the tax you owe, midnight 31 January 2020

For further information please visit the GOV.UK website.

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