Andrew’s practice deals with all aspects of state and local tax (SALT). Though his primary focus is on New York State and New York City matters, Andrew handles multistate SALT matters as well. Andrew has in-depth experience in the area of state tax residency and assists clients from the planning stage through the audit and appeal processes. Andrew counsels clients planning moves out of states like New York on how to accomplish their moves in ways most likely to be accepted by state taxing authorities on audit, while also allowing the clients to maintain some connections to their former home state. He also counsels clients, often in connection with a change of residence, on structuring transactions and ongoing business relationships to minimize the taxes owed by clients to states in which they are non-residents. While Andrew prefers to advise clients on the front-end of a move, he also understands that many clients will only seek his counsel after they’ve received an audit notice. Andrew has extensive experience defending clients’ residency changes in the audit context. Andrew is a tenacious advocate for his clients. When audits or administrative tax litigation is involved, Andrew rolls up his sleeves and goes head-to-head with auditors and lawyers representing the state tax departments. In the residency space, Andrew has successfully represented hundreds of clients in audits and well over 100 clients in appeals of contested residency audits. Andrew's experience in residency matters also extends to 548-day rule and 30-day rule planning and audits. He has successfully helped many clients plan for, execute, and defend on audit, 548-day rule and 30-day rule strategies, which resulted in nonresident status in New York. Clients he assists in these matters include: New Yorkers wishing to minimize state and/or city tax on discrete liquidity events, US expatriates working abroad, and those wishing to change their residency to a foreign country. Andrew is also involved in a host of other New York tax controversy work. Recent matters include – audits and appeals dealing with the application of the New York’s MCTMT to limited partner income, Article 9A corporate apportionment audits, and New York sales and use tax audits and appeals. Finally, Andrew is heavily involved in the area of multistate tax compliance for cross-border businesses. In conjunction with appropriate federal and international tax planning, Andrew advises on U.S. state and local tax compliance issues to identify tax liability and risk concerns for cross-border businesses. Once the compliance issues are identified, Andrew works with these businesses to resolve past compliance issues and ensure compliance on a go-forward basis.

Dan is a member of the firm's Tax Practice. Licensed in both New York and Florida, Dan focuses on state and local tax matters, and regularly advises individuals and businesses on different aspects of New York State and New York City personal income tax, sales and use tax, corporate franchise tax, and several other lesser-known taxes. While focused on tax matters, Dan often counsels clients on a wide variety of legal matters, teaming up with his colleagues in different disciplines to deliver creative, pragmatic, and efficient solutions. Dan’s clients frequently rely on his guidance for: tax planning for significant liquidity events; changing or establishing state and local tax residency; income, franchise and sales tax substantial nexus issues; complex business income and earnings allocation issues; and related matters. He has extensive experience representing taxpayers in audits conducted by several tax jurisdictions, and also represents taxpayers at various levels of tax controversy dispute resolution and appeal. Dan enjoys the opportunity to share his views on current state and local tax topics and legislative developments through speeches and in articles published in a variety of state and local tax publication

Mr. Klein, Chairman of the Firm, concentrates on New York State and New York City tax matters. He also has over 35 years of experience with federal, multistate, state, and local taxation. He is chair of the State and Local Taxation Section of the ACE Accounting Society. Mark is editor of New York Tax Highlights; contributing editor of CCH’s Guidebook to New York Taxes and co-author of CCH’s New York Residency and Allocation Audit Handbook, CCH’s New York Sales and Use Tax Answer Book, and NYSBA’s Contesting New York Tax Assessments. He has been quoted by the Wall Street Journal, New York Times, Associated Press, Miami Herald, and CNBC, and has appeared on CNN for a live interview on changing your residency. He was named 2021 “Lawyer of the Year” in the new edition of The Best Lawyers in America. He is admitted in New York (1983), Florida (1983), New Jersey (2019) and before the U.S. Supreme Court. Mr. Klein can be reached at mklein@hodgsonruss.com or @MarkKleinNY.

Mario is a member of the firm’s State & Local Tax Practice. He counsels individual and business clients on all aspects of state and local tax, including planning, compliance, audit, and litigation. Mario has ample experience in the state tax residency area and assists clients in planning their move and through the audit and appeal processes. He often counsels clients at the planning stage on structuring ongoing business relationships and transactions to minimize taxes owed to states in which clients are nonresidents. Mario also consistently works with businesses to assure they are compliant with applicable state sales and use taxes, and if they are audited, he defends their compliance as well. Mario was a Summer Associate with the firm before graduating from law school. While earning his J.D., he was a member of the William & Mary Law School Federal Income Tax Clinic and assisted in the representation of low-income Virginia taxpayers before the IRS and in U.S. Tax Court cases.