Formally trained in tax accounting at PriceWaterhouseCoopers LLP (PwC) and Deloitte Tax LLP with over half a decade of professional taxation experience, Derek is a certified public accountant with experience navigating Tax Code 280E, which disallowed individuals to deduct ordinary and necessary business expenses to operate their cannabusinesses. David started California Cannabis CPA with the goal of helping businesses identify and apply tax strategies to increase their cash flow while making sure they are in full compliance with all applicable rules and regulations.