HM Revenue and Customs have alerted us to a “computer” issue they are experiencing with Self Assessment Statements. There is a possibility that if your Self Assessment Tax Return was submitted to HM Revenue and Customs prior to 31 October 2017 that any payment on account for 2017/2018 will not be calculated and included on your statement.
HM Revenue and Customs are aware of the problem and working to amend it with affected statements to be reissued in due course.
Until the issue is resolved, HM Revenue and Customs have advised that you should pay both the balancing payment for 2016/17 and payment on account for 2017/2018 regardless of the amount on the Self Assessment Statement you receive before the deadline of 31 January 2018.
Contact us if you need assistance with your Self Assessment payments if this applies to you.