1 - Go to the Sales menu and select 'Booking Enquiries'.
2 - Here you will be shown a list of all the Bookings on the ReRum system. Click on the Booking you would like to add a Credit Note for.
3 - Click on the 'Sales Invoices' tab.
4 - Click on the Invoice you would like to Credit.
5 - Click the red 'Reverse' button to reverse the whole amount.
6 - If you go back to the 'Sales Invoices' tab, you will now see that a Credit Note has been created.
7 - Click 'Post Invoice' on the sales credit, and once prompted with the option to confirm or cancel, click 'Confirm'.
8 - On Xero, go to Accounts -> Sales.
9 - Click 'See All'.
10 - Here you can see the invoice has become a credit note.
11 - The money has been credited back to the account.