First would you please raise your tool head off of the bed. Then measure from the metal plate under the heat bed to the bottom of the X carriage guide rails. Please disable your stepper motors from the LCD display. Then adjust the side that is higher than the other down to be equal to the other side. You can do this by turning the silver coupler that attaches the motor to the threaded rod.
Once you have done this, Go to configuration (or control), then select advanced settings, then select V max Z and move it to 3, then go back one screen and click “store memory” to save the change.
Once you are done with this please try to raise and lower your Z axis again.
To adjust the Z binding on the Taz, you must first locate the 4 Allen head screws that attach the X carriage assembly to the Z nut mounts. Once you have located them, then you will loosen all 8 Allen head screws, 4 on each side. After this you will need to Auto home the printer. Then move the Z axis to close to the top of the printer using CURA (245mm from home). Then re-home the printer again. Please do this 2 times bottom to top and back. Then please move the Z axis to the middle of the printer. Once you have the X carriage in the middle of the printer, re-tighten the 4 Allen head screws connected to the Z nut mounts on each side.
Please do not over tighten the Allen head screws.
Once this is completed, please run another print and see if the Z binding is decreased.