Where can i find out choices for postings after phase 2 training?

Usually you'll find out at Phase 2 training where you're posted. If you know about the army and what roles you're looking at you can dig around the internet to find out the locations of different units so you have an idea. Once you've got through into your first unit, postings are better as you have a good choice, early on so you can start looking and thinking about your next job. I hope that helps.