To create POS Bill on Web, please follow below mentioned steps:
Step 1: Go to Settings.
Step 2: Click on Preferences under General Settings, now click on POS and enable toggle button for Activate POS and Update Settings.
Step 3: In the Sales Dashboard > Click on POS Billing.
Step 4: Add the Products and Quantity and click on Checkout.
Step 5: Click on Save & Print.