Photograph of Sumiyo Tymchuck

Sumiyo Tymchuck

Tax Director


Sumiyo joined D&H Group LLP in February 2024. Sumiyo has been a CPA since 2000 and specializes in US & Canadian cross-border individual taxation. She obtained her US Certified Public Accountant designation from the Washington State Board of Accountancy in 2016. Sumiyo assists clients with annual compliance and cross-border tax planning, including US Estate taxes. Prior to specializing in cross-border taxation in 2010, Sumiyo gained extensive experience in business management and tour accounting of entertainers, assurance services, Canadian personal and corporate income taxation and controllership. Sumiyo is bilingual with proficiency in both English and Japanese.

Your Team
  • BBA, Simon Fraser University
  • Chartered Professional Accountant (Chartered Accountant – 2000)
  • Certified Public Accountant (Washington)
  • AICPA U.S. International Tax Certificate
  • Canada-US cross-border taxation and planning of individuals, including:
    • Filing status analysis
    • Emigration & Immigration planning
    • US taxation of artists and athletes
    • IRA/401(k) transfer
    • US citizenship renunciation planning and tax compliance
    • Foreign corporation ownership & business structures
    • Foreign trust issues for settlors and/or beneficiaries
  • US Estate Tax planning and compliance
  • US tax compliance for individual taxpayers
  • US Streamlined Procedure filing for individual taxpayers