How to void an order

First you need to go to the POS module.

After that you want to find on the top menu where it says Orders and click on it.
Now you can see all the orders.  Scroll through orders manually or you can search by filter that you find on the right side. After you have found the order, click on it. Now you have all the details shown for that order. To void the invoice you can see the first option that says “VOID”.