In USA, the Internal Revenue Service collect income tax on service person's tip. They estimate the restaurant revenue and calculate tip amount. If the customer did not give tip, service person actually lose money serving. Another thing, if more than four (including four) person together, the bill would have automatically added 15% tip. You have to be careful to avoid paying double tip and/or paying tip on tax on the bill.作者: 只能愛你30天 時間: 2020-10-18 08:00 PM