There is a return area for each vehicle. You can see this in the app by selecting your current booking and tapping on the return area. The app will automatically navigate you to the appropriate return area.
Usually, the return area is the parking lot where you picked up the vehicle, as most sharing offers are station-based sharing.
In individual cases, the return area is a larger area or several areas drawn on the map in the respective city. In this case, the vehicle is offered in a free-floating sharing.
Please always return the vehicle in the marked return area so that the next driver can find the vehicle.