Error in HMRC's 2016/17 tax calculator software

Members will have no doubt seen recent reports in the national press and other material about an error in HMRC's 2016/17 tax calculator software which means it is not able to calculate the correct tax liability in certain situations where a taxpayer's income contains a particular mixture of savings and dividend income.

The problem concerns the dividend and personal savings allowances introduced in April 2016 and affects taxpayers filing online using HMRC's software and third party packages. HMRC will not be able to fix the problem until 2017/18.

As a result, HMRC added online self-assessment filing exclusions for 2016/17 on 17 March 2017, with further changes being made to those exclusions on 11 April 2017 (see exclusions number 50, 51 and 52).

We are currently in urgent discussions with HMRC about this issue and we will report further details on our website and in the weekly technical newsletter sent to all members as soon as they become available.

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