Changing billing details for the placed order is a very easy process. You can follow below path to modify billing details
Twirll PoS > Orders > Order Selection
Step 1:-Logon twirll POS. Go to Orders section where all your orders will be listed.
Step 2:-Click on the order whose billing details is to be changed
Step 3:-Click on “More” button to open order details.
Step 4:-Your order details will be opened, click on “Edit Order” button.
Step 5:-Click on the edit button in front of billing details and it will be opened for editing.
Step 5:-Fill the details in the respective inputs and click on “Save” button. Your billing details will be successfully updated