VAT Registration in the Netherlands
In the Netherlands, VAT is called BTW (Belasting over de Toegevoegde Waarde). If you provide services from the Netherlands, you generally need to register for BTW with the Belastingdienst (Dutch Tax Authority).
Kleineondernemersregeling (KOR)
The Netherlands offers a small business scheme that exempts businesses with annual turnover below €20,000. Under this scheme, you don't charge VAT but also cannot reclaim VAT on purchases.
If your turnover exceeds €20,000 or you choose to opt out of the KOR, you must register for VAT and charge 21% on most services.