Hmmm...No one asked us last year in either of our Italian Airbnbs.
Either they were tax cheaters who rented under the table or they got your personal data in another way.
Incidentally, I wouldn't trust a tax cheater to respect fire prevention rules. Or to have an insurance policy against theft and domestic incidents that covers paying guests that are not supposed to pay.
confirming we are tourists, not subject to any local rental tax.
This is strange: it's not the "tax office" that wants those info, but the cops. It's an anti-terrorism law.
Tourists are supposed to pay the city tourists tax, while there are no "local rental tax" in Italy. I wonder if some city is trying to crack down on AirBnB. I'd really like to see that form.