Service
Tax advice
- Tax advice national and international
- Lump-sum taxation
- Trusts and foundations
- Gift and inheritances
- Voluntary disclosures
- Tax rulings
- Social security issues
Compliance and legal procedures
- Preparation of tax returns
- Control of tax assessments and tax invoices
- Legal procedures
International tax law
- Double taxation issues
- Relocation to and from Switzerland
- Questions relating to the secondment of employees (expatriates) , incl. payroll taxes, retrospective ordinary assessment or supplementary assessment
About me
Sonja Trinca
Education
Swiss Certified Tax Expert | Bachelor of Science in Business Law at ZHAW
Professional activities
- Director at Trinca Tax Consulting GmbH (since 2019)
- Consultant at von Ah & Partner AG (since 2020)
- Tax advisor at ADB Altorfer Duss & Beilstein AG for private individuals and companies (2006 - 2018)