Originally Posted by PB86

I suspect it has been answered before, but my search hasn't had any luck. I made a booking using Avios with BA on an AS flight to HNL. I would like to see if I could add my Mileage Plan number to the booking in order to utilize my MVP75k status one last time, but every time I add that information on the BA site, it never actually makes the changes. Any known work arounds?