Mo is a senior manager in RSM's Washington National Tax SALT group. He routinely examines state and local tax issues and the impact of legislation on middle-market businesses. He is responsible for tracking legislation, reviewing significant court developments, providing client service and acting as a technical resource. Mo's experience has included state tax law research and planning, property tax appeals, state audit defense representation through appeals and settlement negotiations, voluntary disclosures, and a full-spectrum of _Wayfair_ planning and response. Mo has written over 300 articles on various tax developments and has been published in _The Tax Adviser_ and _State Tax Notes_. He also chairs the AICPA State and Local Taxation Technical Resource Panel through 2024. Prior to joining RSM, Mo was a manager in a Big Four firm rotating between the Washington National Tax, Philadelphia, and Pittsburgh offices. Before beginning a career in public accounting, Mo was a state and local tax attorney in Harrisburg, Pennsylvania. He concentrated on state sales and use tax refund and assessment appeals and on individual and business property tax appeals in over 20 counties in the Commonwealth of Pennsylvania.