Press release: Self-assessment taxpayers face extra complexities from Scottish income tax divergence

The Association of Taxation Technicians (ATT) said that Scottish taxpayers in self-assessment have been experiencing problems completing tax returns for the 2017/18 tax year (which are due for submission by 31 January 2019).

This was likely to extend into the following year as a result of problems with the software used by HM Revenue and Customs (HMRC) to calculate the correct amount of tax owed.

The ATT is calling on the Scottish Government to work with HMRC to ensure that Scottish taxpayers are not adversely affected as a result of these software problems.

Such issues are not unique to Scotland¹ but they are exacerbated by the divergence in income tax rates with the rest of the UK. This increases the number of ‘exclusions’² which either prevent taxpayers from filing their tax return electronically, or result in an incorrect calculation if they do manage to file online.

Three out of the 38 exclusions from online self-assessment identified by HMRC3 are unique to Scotland.

In 2017/18, these three alone are estimated to have impacted 10,000 Scottish taxpayers. A potential fourth Scottish-specific exclusion for 2017/18, currently being considered by HMRC, threatens to further limit the ability of Scottish taxpayers to submit an electronic tax return and calculate the correct amount of tax owed.

Senga Prior, ATT’s Scottish spokesperson, said:

“Problems with exclusions aren’t unique to Scotland, but they are exacerbated by the divergence in income tax rates between Scotland and the rest of the UK. This has resulted in an increasing number of Scottish taxpayers in self-assessment being required to submit their tax returns on paper, instead of electronically.

“If the individual doesn’t realise that an exclusion applies – as they can be hard to spot - and they manage to file on line, it could be many months before HMRC are able to identify and correct these errors.

“Even when a taxpayer spots an exclusion and files their tax return on paper, they face upwards of a three-month wait to find out the correct amount of tax to pay.

“Not only does this fly in the face of the UK Government’s digitalisation agenda, it adds unnecessary delay and uncertainty into what should be a relatively straightforward process.

“The Scottish Government needs to work with HMRC to ensure that the software is adequately and robustly tested to meet the needs of Scotland’s changing income tax landscape and to ensure that Scottish taxpayers in self-assessment do not face additional difficulties as a result of this”.

Notes for editors

1. The problems with exclusions first arose as a major issue across the UK in the 2016/17 tax year, where, amongst other issues, the complexities arising from the introduction of the personal savings allowance and changes to dividend taxation resulted in 18,600 taxpayers being identified by HMRC as having paid the incorrect amount of tax. A further unknown amount (presumed to be in the thousands), were required to file on paper.
2. A self-assessment tax return is ‘excluded’ when HMRC’s self-assessment tax calculator will not compute the correct tax liability. For some exclusions it is not possible to file online as HMRC’s system will not accept the return, for others it is possible to file online but HMRC’s system will not calculate the tax liability correctly from the information on the return
3. For a full list of exclusions from self-assessment, please see here.