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- Argentina
- Aruba, Bonaire, Curacao and St. Maarten
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- Barbados
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- British Virgin Islands
- Canada LLP
- Canada RCGT
- Cayman Islands
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- Dominican Republic
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- Honduras
- Jamaica
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- Montserrat
- Nicaragua
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- Paraguay
- Peru
- Puerto Rico
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- St Vincent and the Grenadines
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- United States
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- Albania
- Armenia
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- Azerbaijan
- Belarus
- Belgium
- Bosnia and Herzegovina
- Bulgaria
- Channel Islands
- Croatia
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- Denmark
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- Germany
- Gibraltar
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- Iceland
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- Lithuania
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- Moldova
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Private individuals
Grant Thornton Switzerland/Liechtenstein will provide advice and assistance on questions relating to many different national and international tax returns and declarations.
