Sales tax issue

Aha ok Thanks alot to answer me and wish you a good day.

Selam @mohamed1313. You’ll get awesome help here if you also help us to understand what you need. Otherwise it’ll get nowhere
 You may think there is just a single way to add service charge but in fact there are several ways to do that. So when you ask a question about service charge we really really really need to know in detail how you implemented that. As I’ve mentioned in guidelines to be able to give better support we normally just skip questions if it does not have needed detail but @Jesse tried to help. I hope you’ll appreciate this.