Cabinet de Défense Fiscale is a Laval, Quebec tax defence practice led by Louis Sirois, who represents clients facing criminal tax prosecutions from the Canada Revenue Agency and Revenu Québec. The practice focuses on defending individuals under criminal tax investigation, contesting evidence brought by prosecutors and reviewing the validity of search warrants and seizures.

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A calendar with a checkmark beside a clockBy appointment

Where to find them

3030, boul. Curé-Labelle, Bureau 300, Laval, QC H7P 0H9 · 438-386-4223

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Listing compiled from the firm’s public website in July 2026. Verify licence status in the Barreau du Québec directory ↗