See Possible to display the four auto-leveling values? and SOLVED: Taz 6 auto leveling is >0.5mm off (NOW PERFECT TO 0.01mm!) for some tips on how to determine (and fix) the “levelness” of your bed.
See Possible to display the four auto-leveling values? and SOLVED: Taz 6 auto leveling is >0.5mm off (NOW PERFECT TO 0.01mm!) for some tips on how to determine (and fix) the “levelness” of your bed.