Are you printing direct-on-base? If so be aware the first several layers get compressed.
There’s a menu option on the display for Z Fine Tuning which might help. Print something of a known height (I use these calibration cubes) then measure them. You can adjust the tuning to compensate for the compression or other inaccuracies.
Just keep in mind if you raise the platform too high your prints might not adhere. Also your build plate probably isn’t perfectly level, so there may be some variance across it.
The best dimensional accuracy typically comes from printing on rafts and at an angle. If you’re doing that and still running into poor Z tolerance, you might check and (if necessary) lubricate your Z lead screw. Also make sure your platform and tank are firmly secured and there’s no wobble or play. I’ve seen feet break off the bottom of the tank.
If none of that works… reach out to Support.