Bill is the firm's International Tax Practice Co-Leader. He concentrates his practice on federal and international tax law matters, including guiding Canadian and other non-U.S. clients on U.S. tax matters. He has comprehensive experience advising clients on business expansion into the United States, structuring considerations in purchasing U.S. real estate, choice of entity decisions, the tax implications of relinquishing U.S. citizenship or residency status, the application of the CFC and PFIC U.S. anti-deferral regimes, and the new tax reform rules, including the Code section 199A deduction for pass-through entities and the interest deductibility limitations.  

Bill also has broad experience working on tax controversy matters, including advising clients on voluntary disclosure options, IRS audits, and U.S. Tax Court matters. He also works with a variety of tax-exempt organizations and private foundations on obtaining and maintaining tax-exempt status. Bill is also a member of the firm’s Oil & Gas Practice, where he provides advice and guidance on the tax implications for private placements.  


The College at Brockport, State University of New York, B.S., cum laude

University at Buffalo School of Law, J.D., magna cum laude


  • New York
  • U.S. Tax Court


  • Listed, Best Lawyers in America Ones to Watch (Litigation and Controversy - Tax, Tax Law) 2024
  • Listed, Upstate New York Super Lawyers Rising Stars (Tax) 2021 - 2023

  • Co-chair, Albert R. Mugel National Tax Moot Court, 2011-12

News & Insights


  • Secretary, Kevin Guest House, Board of Directors
  • The College at Brockport, State University of New York Graduates of the Last Decade (GOLD) Leadership Board


  • New York State Bar Association
  • Bar Association of Erie County
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William S. Turkovich / News & Insights