In the Transactions menu, which you can access by taping on the menu button on the top left of your screen, you can view all the transactions that have taken place in your Cashier account.  

Displayed on the left, is the list of all transactions for each day. On the right of the date you can see the total revenue for that day. Each transaction shows the hour it was processed and the payment method that was used to pay for it. To search for a particular transaction, press Search.  

When you tap in any of the transactions, its details will appear. The items that were purchased, discounts that were applied, included taxes and the total amount.  

You can select to either send that particular receipt by email or print it. Additionally you can issue a refund, either full or partial by clicking on Issue Refund.