Ignore my previous answer - completely the wrong trip but can’t seem to delete. The trip to Annecy has Approx 2 hours of free time. We left at 9 from Geneva and then left Annecy at 1 ans journey is Approx 1 hour. We had 3 hours - I would say if it’s your first time there you’d want a full day. For me it was a bit too short but I’ve been.

We left from their office across from the square where all their tours met.

I have a British passport which I took with me (in June) and no one even asked about it.

Hi there. Passport is necessary to go around other countries. Maybe a driver’s license is good in America but not Europe or other countries

The central bus station in Geneva in Place Dourciere.

check Viator it's well worth the trip and its only about 30 minutes each way

Yes, some time to walk around by yourself. What happens is the tour ends at the market. The tour guide warns everyone in advance that everyone basically gets distracted (in a good way) just meet up at the bus. We wandered around the market, purchased a sandwich and some beverages - enjoyed those at the park across street on lake. Had time to wander around some of the sites we saw on tour that were of interest to us, ate some gelato, bought some cheese, meats and wine for dinner. I think we were one of the first back to bus. Pay attention to where the public restrooms are!! Loved the trip.