On the Business Expense Screen you can see all the expenses you've added.
To edit the business expense tap the green date row.
Then, you need to press the Edit button.
On the pop-up you can see details of specific expenses.
You have the ability to cancel changes, or you can delete a business expense if required by selecting the red X button.
After editing you will need to click the green Update button on the right side to save all changes.