Please use the form “Approve intermediary registration authorisation” that you received from the Belastingdienst (Dutch tax office).

RSIN/BSN/Fiscaal nummer = Enter your BSN (Social security Number)

Activatiecode = Enter your activation code (“Activatiecode” 9 Digits) ***-***-***

The 9 to 15 digit activation code can be found behind “Activation Code” in the letter.