<p>Your only allowed to register when your at Orientation, they recommend you to go to the FAC when you are at orientation to register, but you can register via the registrar.utexas.edu. There is no way around their restrictions, sorry. Either way, you should be fine. Not sure which Calculus classes you are talking about when you say II or III. There are 2 routes: Calculus C and D, or Calculus K,L, and M. If you have credit for BC, then take M , if you have credit for only AB then you have to either take D or L and M.</p>