i buy a "3.2" TFT touch LCD with ILI9341 LCD driver for Arduino mega2560 , i already include URTouch and UTFT lib , but i find the URTouch example ex. URTouch_QuickPaint.ino
i think i already solved this problem, first , you need using URTouch_Calibration.ino to get CAL_X, CAL_Y , CAL_S , the sample code
Path:\Documents\Arduino\libraries\URTouch\examples\Arduino\URTouch_Calibration