As far as last year goes, we were only allowed to update it once as far as I remember. This means that if you want your fall semester grades included in the update, I believe you are better off waiting until you can get them on a transcript. If you are willing to use your one update just for summer grades before your fall grades, just know that you probably wont get to update later on for your fall grades. At least that's as far as I can tell. I suppose you could try to call and sweet talk them into a second academic update but I don't know if they'll budge for you in that case. I've never tried.