United Kingdom VAT IT system rules and processes if the UK leaves the EU without a deal 07 February 201946 views1 min read Changes to the way you pay or reclaim VAT if the UK leaves EU-wide VAT IT systems. Source: Gov.uk Brexit Small businesses pay HMRC £3.75bn after VAT investigations UK publishes regulations to deny deduction of input VAT on exempt financial services in case of a No-Deal Brexit