A void occurs when you:
Delete a paid order from Sales > Invoices in the backend
Delete a paid order from the Order History screen in Nomni POS
Delete an unpaid order from the Table Map or Held Orders screen in Nomni POS, if you also have PRINT ORDER DOCKET UPON HOLD ORDER switched on in your Abacus app settings.
View voids
Go to Report > Voids to view your voids report. You can only view voids on the backend.
Scroll down to see your Sales By Time, and click a timestamp to open a list of its invoices
Click an invoice number to directly access the invoice