Mark Sullivan Consulting is a highly reputable consulting firm based in Scottsdale, AZ, offering a wide range of specialized services in tax controversy, tax preparation planning, litigation, and transportation industry consulting.
With unparalleled expertise, integrity, and commitment to service, Mark Sullivan Consulting provides comprehensive solutions to clients facing IRS audit, collections appeals, ERC issues, and corporate transparency matters, while also offering expert witness services and guidance on transportation industry challenges such as trucker per diem issues.
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