Hello there, I really need to know one thing asap. I am currently enrolled in a PhD which I am not satisfied in. So I am leaving and going to Australia for a new PhD. When I mention this in my GTE letter for the visa, I guess I have to show them the proof of my enrollment here. So what should I show them? I don't have much time. Please help.

Could you show them your offer letter? Or email the university asking for an offer letter. Other people will have had the same visa problem, so they should know what to do.