Mark Stone is the Managing Partner of Sales Tax Defense LLC since 2006.� The firm specializes in Sales, Use and Transaction Taxes. Mark's work as a NY state tax auditor as well as a Tax Manager at several prominent accounting firms over the past 20 years has earned him a reputation as one of the top professionals for multi-state Sales and Use Taxes. He is frequently invited by various organizations to speak on Sales & Use Tax issues, and serves as an Expert witness testifying in tax court on behalf of clients. Mark is an adjunct professor at Long Island University C.W. Post.
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