How to enter a purchase invoice without vAT

I am VAT exempted and always get confused when I receive an invoice that does not mention VAT.

For example, I rent a room from a non-profit organisation and receive a monthly invoice for this. The invoice simply states the amount that the room cost (€60). No VAT…As a VAT-exempted person, shouldn’t I always have the 21% VAT on my purchase invoices? And if it is not stated, shouldn’t I file a special VAT return (and thus pay the VAT again)?

Or is it okay to simply enter an invoice without VAT and consider that amount to be the amount incl. VAT?