Are you looking for the Best Tax Services in Old Town Scottsdale? Then visit us at Mark Sullivan Consulting, PLLC. I specializes in the intricate realm of federal tax controversy representation, appeals, and consulting, catering not only to individuals and businesses but also extending the expertise to renowned law and accounting firms nationwide. I also provides income tax preparation and consulting services. My extensive experience as a former revenue officer has uniquely positioned me to navigate the intricate landscape of federal tax matters. Now, based in Scottsdale, AZ, I continues to offer my expertise to clients across the nation, ensuring that their interests are diligently and professionally represented. Visit us for more information.