Depending on your company settings, as an approver, you can have the option to edit expenses.
Here are the steps to edit expense as an approver.
1. Go to Expense > switch role from Personal to Approver.
2. Click 'To Do'
3. Select the expense you would like to edit. All fields that are not greyed out can be edited. You can also split the expense if needed.
4. Once you have completed the changes, click Save or Approve.
Note: If your company has enabled the Controller. The controller can also edit the expense depending on your company settings. To edit switch the role to Controller and follow the same steps.