For daily ride changes, you will have to wait for the Single Trip Booking window to open before being able to make edits to individual trips pick-up/drop-off MRT stops.
During the "Single Ride" Booking window, you can cancel your rides on those days and book a single trip, up to 3 hours in advance of the ride time. Seats are subjected to availability on a first come first served basis.
* You will only be able to make a booking onto existing MRT pick-up/drop-off stops that are generated from priority 1 booking window.
Click here to access "Single Ride Bookings" FAQs