The Dutch tax authorities always and only communicate through paper mail and/or through your personal portal on the website belastingdienst.nl - which can be accessed with Digid. 

Messages through other forms of communication (whatsapp, text messages, e-mail, social media) are fake and scam. The bank account number of the Dutch tax authorities to transfer money into can be found on their website

Because of the fact that correspondence from Belastingdienst is in Dutch, it is sometimes not totally clear why it is sent, what it means and if any action is required. Therefore, we listed  the most common letters from the Dutch tax authorities below - by subject. Click on the relevant subject to read what the letter tells you, if action is required and which action you should take.