Katherine Piazza Katherine is a member of the firm's State and Local Tax Practice where she focuses on state and local tax litigation and planning. She represents clients in a wide range of multistate tax issues, from planning and compliance to audit and litigation. Katherine also advises on issues concerning income, gross receipts, sales and use, and franchise taxes. In addition, she works with clients on tax planning, residency planning and other administrative law matters. Prior to joining the firm, Katherine was a state and local tax associate in an international law firm where she represented multinational and domestic corporations, limited liability companies, partnerships, and individuals in a variety of multistate tax issues. She also worked in an accounting firm's state and local tax practice where she advised clients on a variety of state and local tax issues.