Underneath the homework description and entry box you'll see a list of all your progress reports for any homework or action item you have reported on. You can filter these to show only certain items if you want, and also sort them in different ways. Just use the Sort and Filter drop downs on the right hand side of the screen.
You can view your coach and other course members' comments, if there are any, underneath each entry. You can also comment on any course member's progress report if you want by clicking the Comment link (this link will not appear if they have disabled comments).