Because the Union OSS is a big step for E-commerce sellers which simplifies up to 95% of VAT obligations, as it allows them to:
- Register for VAT electronically in a single Member State for all intra-EU distance sales of goods and for B2C supplies of services;
- Declare and pay VAT due on all supplies of goods and services in a single electronic quarterly return;
- Work with the tax administration of their own Member State and in their own language, even if their sales are cross-border.