The core activity of US & International Tax Services SA is to provide tax consulting and services, particularly in the field of international tax law, with a focus on US and Swiss tax law. Specific services include: Tax consulting and planning for individuals, companies and trusts; Preparation of tax returns for the USA and Switzerland; Advice on international tax matters, including the application of tax treaties and compliance with FATCA and OECD rules; Support in setting up US companies and complying with US tax obligations; Advice on international pension and social security law; Support in complying with US tax obligations for foreign investments and business activities.