If you have entered incorrect information on your expense you can edit it to fix it. Remember to save your changes. To edit an expense, go to your profile and find the expense you want to edit on the Transactions section of your page.
Click on the Edit icon on the left to edit the details of a expense.
You can also download an invoice you've submitted by clicking on the Download button on the left side of the expense description box.
Clicking on Download will generate a PDF with the metadata of the invoice: