Here is my story.
I was accepted to top-30 world university to MS in Electrical Engineering(EE) progaram. In total I already have 3 degrees: MS in EE (GPA:4.0/4.0), BS in EE(GPA:3.9/4.0), and Bachelor in Economics(GPA:3.8/4.0).
In my application I misunderstood instructions, which wanted me to list "all universities attended". As far as all my degrees were from one single university I though that I was not obliged to enter all of them, because formally I did list "all universities" by mentioning at least one of those degrees. That is why I decided not to enter "irrelevant" Bachelor in Economics degree and entered only BS in EE and MS in EE degrees.
After few months I was successfully accepted to the degree program I had applied to. But after talking to some other applicants I understood that in application form they wanted me to enter not "all universities" but rather all degree programs attended. So I believe that I should have listed that economics degree as well.
Apparently, concealing this degree didn't give me any benefits during admission, but most likely even might have "downgraded" my application to some extent. So I unintentionally presented myself to be worse that I am in reality.
What do you think I need to do? If I contact admission office I can end up being rejected and I cannot risk that much.
On the other hand, If I enroll and then they disclose this fact what they most likely will do?