ABOUT US
Global Tax Consulting is a trusted leader in U.S. and international tax compliance, serving individuals, businesses, expats, foreign nationals, and accounting firms worldwide. With over 50 years of combined experience, our team of Enrolled Agents (EAs), Certified Public Accountants (CPAs), and registered tax preparers brings unmatched expertise to every tax situation—no matter how complex.
We specialize in foreign reporting, cross-border compliance, expat taxation, and resolving complicated issues that many firms are not equipped to handle. Our mission is to simplify the tax process while ensuring every client is fully compliant, protected, and supported.
Our Story
Global Tax Consulting was founded on a simple belief: taxpayers deserve accurate, reliable guidance—especially in the complex world of international taxation. We recognized how many individuals and businesses struggle with foreign reporting requirements, tax treaties, IRS correspondence, and multi-jurisdictional filings.
To bridge this gap, we built a firm where advanced tax knowledge meets personalized service. Today, we serve clients in countries around the globe, helping them navigate the ever-changing U.S. tax landscape with clarity and confidence.
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Gustavia Robinson
Managing Partner, Global Tax Consulting
Gustavia Robinson is the Managing Partner of Global Tax Consulting and a respected expert in U.S. and international tax compliance. With extensive experience serving individuals, businesses, expats, and foreign nationals, Gustavia brings deep technical knowledge and a strategic, client-focused approach to every engagement.
As a leader in the firm, Gustavia oversees complex tax matters involving foreign reporting, tax treaties, cross-border planning, and international compliance. Her ability to simplify complicated tax issues and deliver accurate, reliable guidance has earned her the trust of clients and partner firms worldwide.
Gustavia is committed to ensuring that every client—whether an individual taxpayer or an accounting firm seeking specialized support—receives personalized, detail-driven service. Her dedication, professionalism, and passion for excellence have helped shape Global Tax Consulting into a leading resource in the global tax field.
Christine Castro
Christine Castro is a skilled and dedicated tax professional at Global Tax Consulting, specializing in U.S. tax preparation, international compliance, and client support for individuals, businesses, and foreign nationals. With a strong foundation in domestic and cross-border tax regulations, she plays a key role in helping clients stay compliant, organized, and informed throughout every stage of the tax process.
Christine assists with a wide range of services, including expat tax preparation, foreign reporting requirements, treaty research, and documentation support. Her careful attention to detail, commitment to accuracy, and client-first mindset ensure that each taxpayer receives reliable, timely, and stress-free assistance.
Tax Professional, Global Tax Consulting
Christine’s approachable communication style and willingness to go above and beyond make her a valued member of the Global Tax Consulting team and a trusted resource for clients navigating complex U.S. and international tax matters.
Our Expertise
Our team’s combined experience spans decades of hands-on tax work, including:
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U.S. domestic taxation
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International tax law
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Foreign reporting requirements
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Expat tax compliance
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Resident and non-resident alien taxation
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Complex global tax planning
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IRS representation and audit support
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Preparation of specialized returns (5471, 3520, PFIC, 1120-F, and more)
We pride ourselves on staying ahead of evolving tax laws and regulations so our clients always receive current, accurate, and compliant solutions.
Who We Serve
We proudly serve a diverse global audience, including:
U.S. citizens & residents
U.S. expats living abroad
Small and mid-sized businesses
International businesses operating in the U.S.
Tax professionals seeking outsourcing partnerships
CPA firms needing foreign compliance support
Foreign nationals (resident & non-resident aliens)
