Depending on your company settings, as a Controller, you can have the option to edit expenses.

How does this work?

1. Go to Expense > switch role from Personal to Controller.
2. By default you'll end up in '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 role of Approver: the Approver can also edit expenses (depending on your company settings). To edit switch the role to Approver and follow the same steps.