If you are a sole proprietorship, you will use two VAT numbers, the VAT-id and the VAT tax number. The VAT identification number is used for all transactions with suppliers and clients; for instance, on your invoices, quotations, and your website. The VAT tax number is used for all correspondence with the Dutch Tax Administration. If you register your sole proprietorship or partnership in the Netherlands, you will receive your VAT identification number together with your VAT tax number from the Tax Administration.