CSS update

I have made some mistakes in my CSS. I contacted the college I have already sent to. But I think I can update for my new colleges.
So after adding my college through Add program/colleges I got no way to edit my profile. The only thing I can do is to select my admission and housing plan.
Please, how can I edit my profile?

Once submitted, you cannot update a Profile online.

Contact the college.

From previous post I read about a student creating other profile and send it. How is that possible? Creating other collegeboard account?!