The latest determination published by the Tax Appeals Commission (TAC) on Wednesday may be its highest-stake one to date. The dispute between a taxpayer and the Revenue Commissioners over the imposition of stamp duty on a share cancellation scheme in October 2019 affect some of the most high-profile corporate deals of the past two years. Hundreds of millions of euros are at stake, representing over one third of the Exchequer’s total stamp duty take last year. The document runs to 82 pages. “The multi-faceted nature of the appeal, the response and the debates that ensued (which included interpretation of the…