Guidelines for Editing an Expense Report
You can make changes to an expense report before it is posted. You cannot edit posted expense reports.
You can edit a Submitted or Approved expense report only if your system administrator allows users to resubmit expense reports.
If your system administrator does not allow users to resubmit expense reports, you can submit an expense report only once. If you want to edit an expense report after it is submitted or approved, contact your system administrator.