The Dexxter website states that if you rent out as a private person with vAT liability, you are not self-employed and do not have to pay social security contributions. I applied for my VAT number through Acerta and they have already sent me two invoices to pay social security contributions. I called them to say that this is not correct, but they say that I do have to pay the contributions. The Federal Public Service Finance was unable to help me further. Does anyone know where I can go for help? (uRL to official website?)