How to add "Button" to add & remove Service charges

Hi,
i wan to add a Button to add and remove my service charges, and in other end i need service charges print on Bill in condition of if I apply service charges… without service charges apply it should not be display on Bill Print. thanks

Create a calculation selector and in your calculation type check the toggle calculation button. Wrap your ticket template printer tag in [] brackets like [<J00>{SERVICES}]

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