It is not possible to modify a race already reserved. We invite you to cancel it and make a new reservation.
We invite you to follow the cancellation steps through the following link: Conditions for canceling an Allocab trip.
How do I edit a race when I'm already in the vehicle?
You can request, on board, the modification of the arrival address by asking the driver to switch to free running (modification of the arrival address or addition of stages).
You can find more details about free running in the article : Operation of the free stroke