We have stayed at numerous Italian Airbnbs and not once have we had the host fail to declare the Italian occupancy tax prior to booking. It was only on arrival that Maurizio discussed this with us. He was also unreachable in regards to this payment. All of the Italian Airbnbs we have stayed in have included this in the total cost. Please note that the total payment made through AirBnb specifically noted that additional fees and taxes were included, meaning that no additional payments were required.