Simon Thang Simon Thang is a sales tax lawyer and the principal of Thang Tax Law. Simon’s unique background in sales tax (GST/HST, PST), customs and trade enables him to take a smart, insightful approach to assisting his clients. Extensive Experience – Simon has over a decade of experience exclusively in sales tax (GST/HST, PST), customs and trade gained at prominent Bay Street law firms. But he has always assisted a range of clients including multi-nationals, small and mid-sized businesses and individuals. This experience gives Simon the insight to advise on a range of issues and industries, including: owner-managed businesses; purchase and sale of businesses, real estate transactions, financial services and investments, business reorganizations, cross-border transactions, medical and health professionals, and non-resident businesses. Simon also has experience in customs and trade matters. In addition to providing sales tax (GST/HST, PST) advice, Simon represents clients in all phases of tax and trade disputes, from tax audit defence to tax appeals before the Tax Court of Canada, provincial courts, and the Canadian International Trade Tribunal.