We add a mandatory 18% gratuity to all large parties in the restaurant, but there's no easy way to do this without getting out a calculator and doing the math (horror!) manually.
I tried creating a new "tax" of 18%, but it only half-works. On the plus side, it automatically calculates what 18% of the bill would be. But on the minus side, it's listed on the customer receipt as "tax," which is a deal-breaker.
For now, we define an item called "Gratuity" with an undefined price/percentage and then calculate it manually for every bill as described above. It's error-prone and time-consuming, both bad things. Surely Square Register is smart enough to figure out the tip on its own?
