Expert tax dispute resolution. We take the stress and complexity out
of dealing with HMRC.
Jon Preshaw Tax Ltd is an independent practice of former HMRC and Big 4 tax experts
Managing HMRC Investigations
Making Disclosures to HMRC
Resolving Disputes with HMRC
Services for Professional Advisers
Proactively Managing Tax Risk
Advising on HMRC Powers and Procedures
Our people leverage their extensive expertise to help clients efficiently manage interactions with HMRC.
Latest updates and insights from our experts in tax dispute resolution.
Code of Practice 9 (COP9)
Receiving a Code of Practice 9 (COP9) letter from HMRC is a serious matter that requires immediate attention. This letter indicates that HMRC suspects deliberate tax fraud has taken place and initiates a formal investigation. How you respond in the coming weeks can...
Tax Disputes and Investigations – December 2025
This newsletter picks up a number of issues which arose from the November budget which will be of particular interest to those involved in tax disputes. Additionally, we have focussed on some new ‘Guidelines for Compliance’ issued by HMRC which has interesting...
Tax Disputes and Investigations – July 2025
HMRC reactivates enquiries into unallowable purpose Ben Proctor HMRC has been writing to taxpayers with open enquiries involving the unallowable purpose rule at Section 441 CTA 2009. The letters invite taxpayers to reconsider their position in light of three Court of...
Tax Disputes and Investigations – November 2024
The Autumn Budget contained several high-profile measures which have obviously been the subject of considerable debate since. In this month’s newsletter, we have looked at some of the immediate announcements which may be specifically relevant for those dealing...