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?
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India’s Supreme Court rattled cross‑border structuring with its Tiger Global ruling. Subsequent rule changes narrowed the impact, but significant risks around GAAR, substance and treaty access persist
ITR sat down for a pre-event interview with Tim Zech, WTS Germany, and Jeff Soar, WTS UK, keynote speaker at next week’s ITR AI in Tax Forum 2026 in London
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