Service charge can be configured to automatically appear on receipts and in the checkout. To enable this follow these steps:
Open the shopwave iPad POS app and login with your credentials.
Click the menu button
Click the settings button
Click the printing tab
Select "service charge" and chose a default value.
You are good to go.
Removing Service Charge Configuration
To turn off service charge being added to the receipt & checkout screen by default please follow the above instructions and select 0% as your service charge amount.