If a restaurant charges 10% service charge and 12% tax, would you still tip?

Nope no tip if there is a service charge. That takes care of it. Also will not eat there again. At least when I am paying. I prefer to pay the appropriate percentage based on the service I recieve. I am not difficult so she/he must have a real off day to be considered bad by me. Perhaps you should cook more at home.

I'm in the U.S. so I'm sure tipping etiquette is different than where you are, but I would still tip. Tips are supposed to be bonuses for your waiter or waitress. The server most definitely has nothing to do with the tax because that's required by the government. They also usually have nothing to do with the service charge, which is something the owner of the restaurant or the corporate offices are responsible for putting on there. Sometimes servers might get a small portion of the service charge, but if the service charge is 10% and the server only gets a portion of that, it's nowhere near being a good tip. In the U.S. a good tip for adequate service should be 15% and service that goes above and beyond should get 20% or more. So yeah, I would still tip, and you should, too, if you want the server to actually get any kind of bonus for providing you good service.