If you have printed shirts that are out of register, there is a good trick to fixing them. Get a permanent marker and color the white underprint that is showing with either the ink color, or in this case it was easier to color with the shirt color.

Better yet, pay attention and don’t let more than a couple shirts get printed out of register, but at least you can fix them as we are doing today because we both don’t have time to get more shirts and they are expensive shirts.