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Exciting News: Mark Sullivan Consulting Launches New Income Tax Preparation Service!

Updated: Feb 21

I have expanded my tax preparation services to include non-tax controversy clients in response to client demand and CPA firms unwilling to accept clients with tax controversy issues.

  • Tailored Expertise: Trust the seasoned experience of Mark Sullivan, an Enrolled Agent since 1998, in providing top-notch tax services. Benefit from specialized knowledge in IRS federal tax controversy, audit and appeals representation.

  • Comprehensive Support: Whether you're an employee or a self-employed individual, our services cater to your unique tax needs. Mark Sullivan Consulting ensures meticulous attention to detail, guiding you through the intricacies of tax preparation with a focus on the gig economy and transportation industry.

  • Strategic Advisory: Beyond numbers, we offer strategic tax consulting and advisory services. Navigate the ever-evolving trends in federal tax with confidence, backed by ethical and transparent practices that uphold our commitment to unparalleled expertise and customer service.

2023 Income Tax Season
Mark Sullivan Consulting adds income tax preparation services for 2023 tax season

  • Efficient and Transparent Processes: Experience seamless and transparent tax preparation processes designed to save you time and alleviate stress. We believe in making tax season a breeze, ensuring your focus remains on what matters most – your work, business, and personal pursuits.

  • Your Ally Against Tax Challenges: Mark Sullivan is not just a tax consultant; he's your ally in defending taxpayers against challenges. With a positive perspective and a commitment to protecting the weak, our goal is to bring out the good in every person and provide you with a reliable defense against potential tax hurdles.


Embark on this journey with Mark Sullivan Consulting as we launch our new income tax preparation service. Let us take the complexity out of taxes, allowing you to thrive personally and in your business endeavors. Cheers to a seamless tax season ahead!


Schedule a FREE 30-minute consultation with Mark Sullivan HERE


About the author

Mark W. Sullivan, EA founded Sullivan Consulting in 1998 in St. Louis, MO and relocated to Scottsdale, AZ in 2020. He specializes in federal tax controversy representation, appeals and consulting on behalf of individuals, businesses, law, and accounting firms nationwide. In addition, he has served as the consulting and expert witness in numerous civil and criminal cases in multiple federal district courts.

Mark has an unlimited Enrolled Agents license and is admitted to practice before the Internal Revenue Service based on his extensive experience as a Revenue Officer in New York, NY, St. Louis, MO and Washington, D.C..


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