Updating UC with PIP

Hi, my daughter was on DLA (High) and has been awarded PIP (enhanced) from today. I've gone in to my UC account to update but it's taking me through a load of questions including info about school - which is causing an issue because it asks the start date and end date of the course. What end date do I put? She finishing at the main site of a school on 9th July and then from end of August she will be at their post 16 college which is the same school but at a different address. I'm just confused as to what to put. I'm worried that if I say she finishes at the current site on 9th July it will affect child benefit although I have already updated them with the details of the new college. Do I put she finishes on 9th July and then do another change of circumstances after then with the new details? Any help would be great, thankyou.