I read the following return instructions several times
https://community.ricksteves.com/travel-forum/italy/florence-car-rental-zlt-zone
The return path from P.za Taddeo Gadd to the rental return would take Ponte Amerigo Vespucci and continue via di Melegnano before turning left on Borgo Ognissanti.
However, the ZTL map in
https://www.accessibilitacentristorici.it/ufficiali/mappe/firenze_all_a_-_planimetria_ztl_201906.pdf
or
https://www.accessibilitacentristorici.it/ztl/toscana/firenze/mappa
showed that the entire Borgo Ognissanti is within ZTL zone B. And there is a camera at intersection Ponte Amerigo Vespucci/via di Melegnano. If you check google street view, there is a ZTL sign when entering via di Melegnano
My question: To me, it is clear this rental return are inside ZTL (B). That's why I am not clear how to avoid ZTL when driving??
I am sure I am missing something. Please correct me. Thanks...