Registration information

Contact the "Vicerrectoría Académica" or the department of admissions and registration. Normally for undergraduates, registration begins mid-November and ends mid-December. The dates vary, since each university operates on its own calendar.
For the University of Buenos Aires, consult http://www.uba.ar/info1/calen.htm
Some other universities: admisiones@austral.edu.ar; ingreso@itba.edu.ar; informe@uade.edu.ar