So I accidentally clicked on a printer in Chooser and now it keeps appearing on my desktop and when I put it in Trash, I get a message saying the printer will reappear, which it does...annoyingly. Any idea how to get rid of it?
You can turn off desktop printing by disabling the "Desktop Printing" Extension in Extensions Manager. When you reboot, the dektop printer icon will have an X through it and you can throw it away.