EU website with general information on VAT, VAT directives by topic, national and EU rules and guidelines and information.

https://ec.europa.eu/taxation_customs/business/vat_en

Website of the Dutch Tax Authorities - department Value Added Tax.

https://www.belastingdienst.nl/wps/wcm/connect/nl/btw/btw

Dutch Forwarders Organisation

https://www.fenex.nl/

Verify a Value Added Tax - ID

http://ec.europa.eu/vies

Dutch INTRASTAT information

https://www.cbs.nl

Customs & AEO Compliance

https://www.pwmcc.nl/