From your 'My Hub' page (please see below)
If you go to the 'Menu' icon in the top right...
then select 'Financials' from the options
This will show an overview of all your transactions etc where you can then select 'Receipts' from the 4 options at the top of your page.
You can then view all of the receipts you have created.
Simply hit the 3 horizontal grey dots to the right of any receipt to view it in more detail.