Taxing rights are the tax community’s hot potato

The June 21 decision by the US Supreme Court in South Dakota v Wayfair Inc that overturned, by a 5-4 majority, the previous leading case of Quill Corp v North Dakota has a significant effect on sales taxes within the US. But should businesses outside the US also be very concerned, given that some initial commentary suggested that this would result in a rapid change of the definition of permanent establishment?