Partner
Mark Stack
CPA
Mark advises manufacturers and growing businesses on complex tax matters, with a strong focus on state and local tax planning. He helps organizations navigate multi-state tax requirements, operational expansion, and evolving regulatory challenges. His experience also includes international tax planning and transaction-related matters for businesses managing increasingly complex tax obligations.
Education
St. John Fisher University, Master of Business Administration, Accounting
St. John Fisher University, Bachelor of Science, Accounting
Community
Dog Ears Bookstore and Cafe, former Treasurer
Professional
American Institute of Certified Public Accountants
NYCPA – The New York State Society of CPAs
Ask Me About
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Service Expertise
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Latest Insight
California Extends Sales Tax to Prewritten Software and SaaS, Effective January 1, 2027
Beginning January 1, 2027, businesses that sell software or Software-as-a-Service (SaaS) to customers in California (or businesses that purchase it) will be subject to the state’s sales and use tax for the first time. This change comes as part of California’s state budget, signed on June 29, 2026. Senate Bill 122 (S.B. 122) extends California’s […]