Can't find View to edit

Hello, If I click on a request, I see a field called due date. This field is really Deadline_date which is auto-calculated from Priority. I wanted to have user selected Due dates so I created my own field called "Target Due Date". I managed to replace "Due Date" with my custom "Target Due Date" in almost all views. The problem is that I couldn't not find the above mentioned view. To see what I mean, click on a request and you will see a field in the top section called Due Date. I want to replace this with my custom field. Thanks, Glenn