If you cut a small circle, is the slant consistent around the entire edge (that’s normal), or is there a lean towards one edge of the machine?
If the slant is asymmetrical, there’s something else afoot. Perhaps the head, perhaps the tray.
Do you have calipers? You can use the plunge to measure the depth from the edge of your tray to the bottom of the machine near the four corners.
If your tray isn’t seated properly it could have a slant.