Dear angela, thank you for the answer! 🙂
Yes, the info according to EU rules was already entered before, but there has been a change so now I have to update it.
Unfortunately, there's no option to delete at all, because every click takes me to "add tax info -> I need to update it" and then I get the message that my account has been under review.
It seems that I cannot do anything from my side and Airbnb is ignoring me!