About Us
Canadian expertise. Cross-border experience. Practical advice.
About the Firm
Tax Square Professional Corporation is a Mississauga-based accounting and tax firm providing Canadian, US, and Canada-US cross-border tax and accounting services. The firm supports individuals, families, entrepreneurs, and owner-managed businesses across the Greater Toronto Area — including Oakville and Milton — and across Canada, as well as clients with filing obligations or business activity on both sides of the border.
Our work begins with understanding the full structure of a client’s affairs. We then identify the relevant Canadian requirements, flag any US considerations, explain the available options, and establish a practical plan for compliance and future decisions. All work is completed in-house by our own team.
Professional Leadership
Tax Square is led by Adnan Khan, a Chartered Professional Accountant in Canada, a Certified Public Accountant licensed in Colorado, and a Fellow of the Association of Chartered Certified Accountants (UK). His background includes cross-border taxation, accounting, and business advisory, along with more than ten years of accounting education in Canada.
Our Approach
- Start with the Canadian facts, then layer in any US considerations
- Separate confirmed filing requirements from planning opportunities
- Explain risks and options in clear, plain language
- Coordinate returns, disclosures, and supporting calculations
- Document the agreed scope before services begin
Who We Serve
- Canadian individuals and families needing personal tax and accounting support
- Canadian small and medium-sized businesses across every sector
- US citizens and green-card holders living in Canada
- Canadians working, investing, or conducting business in the United States
- Canadian companies entering the US market
- Canadian investors owning or renting out US property
- E-commerce and Amazon sellers based in Canada
- Owner-managed businesses requiring ongoing accounting and advisory support