If you have employees in service, you have to withhold and pay payroll taxes to the Belastingdienst (the Dutch Tax and Customs Administration). Every month you will get an email in Dutch with the details.
At the end of the first sentence of the email you will see the amount to be paid (totaalbedrag):
In the second sentence you will find the final due date for the payment (after vóór, dd-mm-yyyy):
Here you will also find the bank account number where the money can go to. Don't forget to mention the payment reference along with your payment. Down below you can see where you can find the payment reference (betalingskenmerk, e.g. 1234.5678.9101.1121):
Make sure that you mention the payment reference in your payment, otherwise the Belastingdienst cannot process it.
If you have any questions, please don't hesistate to contact us.