From the Xero Dashboard, click on Business and select Invoices.
You can also search for the invoice by clicking the Magnifying Glass icon and typing the invoice number, customer name, and other details associated with the invoice or clicking on the Invoices on the Invoices owed to you section.
On the invoice list screen, select the invoice you are making changes to. For this example, we will be using Bayside Club.
Once inside the specific invoice screen, select Invoice Options on the upper right and click on Void.
There will be a prompt to confirm if you would want to void the invoice. Select Ok to void.
A confirmation will appear that shows that the invoice has been voided.
Voiding an invoice will only make it null, while deleting it completely erases it from the system.