Is there currently a fixed taxi fare from Rome (Leonardo, International) into the city? We're staying in Trestevere? Also is the taxi rank well marked and easy to find? Thank you.
Taxi rank right outside the terminal
Fixed rate 50 euros
Don’t go with anyone offering a taxi elsewhere
Use the official taxi line
In addition, since it is likely you will use a taxi occasionally in the city, I recommend you download the app ItTaxi below. It is the app used by official taxi cabs in Rome and works like the Uber app (Uber not available in Italy, except for Uber Black, an expensive black limo service)
https://www.ittaxi.it/
Hailing taxicabs from the curb is not practiced in Italy, either walk to the closest taxi stand, use the app above, or call.
Thank you both, much appreciated.