I would go with "cut off." "Some letters get cut off on the side...or at the end."
"Cut out" is different: "I bought some blue linen, and if I have time tonight I will cut out the dress pattern." "My mother carefully cuts out all the coupons in the Sunday newspaper."
Cut out can also be used idiomatically: "You kids cut out [stop] all that noise!" "Let's see if we can cut out of [leave] work early today."
And yes, I know exactly what you mean about the printer. Very annoying!
[native speaker and writer, not a teacher]
Student or Learner