California Governor Gavin Newsom recently signed AB 37 into law, which legalizes licensed state cannabis businesses including marijuana growers, processors, and sellers to take deductions for their business expenses on state income tax returns. It exempts these businesses from federal law section 280E, which categorizes cannabis sales under the “illegal sale of drugs” and therefore prohibits these businesses from writing off expenses as any other business would. To read AB 37 in full, click here.