Currently, editing the contents of requisition forms can only be done before the job reaches the "Open Status"
Any other status should be fine, however.
First, go to My Job Portal (in the top right of the screen).
Click on Job, then Approval workflows and then click on the workflow you want to work on
Click on the three dots to the right of the field you want to be able to edit, then click advanced
Here, you can choose at what points in the approval workflow the field can be edited.
Result:
i).
ii).
Hope this helps.