What needs to be done if I wish to shift from evening to morning batch of BA mass communication? Passed class 12th.

You can do so, but will have to re-enrol yourself as the fee is different as well. Kindly speak to admissions department for the same.

You can take it up with any faculty member on the first day of the orientation. Such doubts are taken care of then. It's not a short process since it's another course entirely, but it can be done easily.