Living and working abroad can create complex U.S. tax obligations. At Knox Tax Law, we help Americans abroad, dual citizens, green card holders, and other international clients understand U.S. filing obligations, avoid costly mistakes, and stay compliant with confidence. We serve clients in Basel and throughout Switzerland, as well as other cross-border clients with U.S. tax issues.

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Why Cross-Border U.S. Tax Matters Are Different

Even if you live outside the United States, you may still be required to file annual U.S. tax returns or international information reports. U.S. citizens, green card holders, some dual-status or resident taxpayers, and some non-U.S. individuals with U.S. filing obligations are often surprised by how broad U.S. tax reporting can be.
Common cross-border U.S. tax challenges include:
- Reporting foreign income, pensions, and investments.
- Claiming credits, exclusions, and other available relief to reduce double taxation risk.
- Filing FBARs and FATCA disclosures for foreign accounts and specified foreign financial assets.- Understanding how U.S. tax rules interact with the laws and tax systems of other countries.

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How We Can Help

At Knox Tax Law, we provide both U.S. tax compliance services and IRS representation for cross-border clients. We assist with:
- U.S. Tax Return Preparation for Expats and Cross-Border Clients: Annual filings that are complete, accurate, and tailored to international facts.
- FBAR and FATCA Compliance: Guidance on foreign account and asset reporting obligations.
- Cross-Border Tax Planning: Guidance for families, dual citizens, green card holders, and other international clients with U.S. filing obligations.
- IRS Problem Resolution: Help with missed filings, IRS notices, reporting issues, and other controversy matters involving international facts.- Delinquent Filing and Catch-Up Matters: Assistance evaluating available options for clients who need to get back into compliance.

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Why Choose Knox Tax Law?​

- Tax Attorney Perspective: Knox Tax Law provides both return preparation and legal analysis when cross-border issues create risk.
- Personalized Service: Every client’s situation is different, including income sources, financial accounts, residency history, and filing exposure.

- Compliance and Controversy Experience: We help clients address current-year filings as well as prior-year problems and IRS correspondence.

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Schedule a Consultation

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Whether you are an American living abroad, a dual citizen, a green card holder overseas, or another international client with U.S. tax filing obligations, Knox Tax Law can help you address compliance and controversy issues with confidence.

Contact us today to schedule a consultation regarding U.S. expat and international tax matters.