Go into the paxstore and open the file build for the Q20 that the merchant is using. From here go to the tip section and make sure that tip select is turned on and you’ll see the tip options listed below. Change the threshold to 0 and adjust the percentages that they want. They can only have 3 options for percentages on this device. The option for ‘No Tip Selection’ will display a button that says ‘No Tip’ on the Q20, this should also be enabled.