What is OSS?
OSS means One Stop Shop, it is an electronic portal, which lets you declare VAT generated from sales made inside the EU. That way your Estonian business can manage doing business with one VAT number. Read more about it here.
What is IOSS?
The Import One Stop Shop (IOSS), is also an electronic portal, which lets you declare your sales from goods that were imported to the end consumer from outside of EU or the European Free Trade Association. The IOSS arrangement can only be used for goods costing up to 150€.