What does S1 means as tax status?

S1 tax status refers to a specific classification for individuals who are subject to a particular tax regime, often related to cross-border workers or expatriates. It typically signifies that an individual is not liable to pay taxes in their country of residence due to certain agreements or conditions, such as working in Another Country for a defined period. This status can affect how income is taxed and may provide certain exemptions or benefits under international tax treaties.