Sean Thomas McEwan

Sean McEwan is a tax lawyer at Taxpayer Law. He was called to the Ontario Bar in 2024 and previously served as a Judicial Law Clerk at the Tax Court of Canada.

Sean advises and represents businesses and individuals in income tax and GST/HST disputes with the Canada Revenue Agency (CRA). His practice focuses on tax controversy and litigation, including audits, objections, appeals, collections matters, and proceedings before the Tax Court of Canada. He is known for his thoughtful, strategic approach and his ability to explain complex tax rules clearly and practically. Whether responding to a CRA audit, challenging a reassessment, or preparing for litigation, Sean works closely with clients to develop strong, well-positioned cases aligned with their broader business and financial objectives.

Sean draws on his experience at the Tax Court of Canada to provide insight into the litigation process and judicial decision-making. He works collaboratively with accountants and financial advisors to ensure that legal strategy is fully integrated with each client’s operational realities. Sean has also contributed to tax policy and professional education through bar association committee work and has published on issues relating to tax administration and law.

Outside of his practice, Sean enjoys spending time outdoors and staying active. He has whitewater canoed the Petawawa River in Algonquin Provincial Park and hiked and camped in national parks across Canada and the United States. He also enjoys weightlifting, running, and playing hockey, golf, and baseball.