Self Assessment Tax due 31st January.
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 2017 and ended on 5 April 2018.
|Register for Self Assessment if you’re self-employed or a sole trader, not self-employed, or registering a partner or partnership||5 October 2018|
|Paper tax returns||Midnight 31 October 2018|
|Online tax returns||Midnight 31 January 2019|
|Pay the tax you owe||Midnight 31 January 2019|