I'm looking for when someone replies to a thread or post im in, with the new update I can't seem to find these notifications?

On your home page, scroll down.
Your home page can be customized, see link at the bottom of Home page.
All site info is in the Site Talk Forum, the updates were announced in a thread (now with over 400 replies) with lots of comments, tips for editing and navigating plus additional threads for fixes.

Thanks got it!