Since Massachusetts legalized adult-use cannabis in 2016, businesses entering this sector face intricate tax laws vital for compliance and success. Thorn Law Group, led by Boston cannabis tax attorney Kevin E. Thorn, guides entrepreneurs through licensing requirements with the Cannabis Control Commission and Department of Revenue, noting that medical dispensaries selling solely to registered patients are tax-exempt. Retail cannabis sales incur a combined state and local tax up to 20%, with complexities around allowable business deductions due to federal restrictions. Thorn Law Group helps clients understand these nuances, including the serious penalties for tax evasion, ensuring cannabis ventures operate within Massachusetts law effectively and confidently.