I have a worse problem. I have to intentionally mis-calibrate the touchscreen because the upper right is off. Worse, it isn't linear.

Toward the middle (vertically, center to right side) of the screen the hotspot is about 3/16" above where I'm tapping when the four corners are right.

The calibration appears to be linear which means it can't be fixed by normal calibration values

I've had the tablet for a while and there are a few tiny but deep scratches in the area.

The way I test is to use the browser on a page without links - tap-hold brings up the spinning circle around where it thinks I'm tapping.