Recognized in Best Lawyers since 2023 
Marc A. Simonetti advises and represents businesses throughout the United States on state and local tax matters. His practice includes income tax, franchise tax, sales and use tax, gross receipts tax, tax advice, tax controversy, tax litigation, tax planning, uncertain tax positions, and state tax policy. Based in New York, New York, Marc is an attorney with State Tax Law LLC.
Marc represents clients in state tax disputes from audit through litigation and appeal. He assists with audit defense, administrative proceedings, discovery, depositions, motion practice, trial, and appellate litigation. Marc has argued state tax and constitutional issues before appellate courts in jurisdictions across the country and works to present complex legal and tax arguments clearly. He focuses on developing practical strategies tailored to each client’s business objectives and circumstances.
Marc advises public and private companies—including Fortune 100 businesses, midsize companies, and start-ups—on state and local tax issues affecting their operations. He counsels clients on multistate tax compliance, business expansion, tax planning, and the potential tax consequences of operating in the digital economy. Marc also helps clients evaluate the application of existing state tax laws to emerging technologies and evolving business models.
Marc advises clients on the state and local tax aspects of strategic business transactions, including acquisitions, dispositions, mergers, and restructuring. He works with businesses and their advisors to identify potential state tax issues, assess transaction-related risks, and structure transactions with consideration for applicable state and local tax obligations.
Marc also counsels clients on state tax policy matters. He assists with developing tax-related positions and supporting legislative and regulatory initiatives that advance his clients’ business objectives.
