If the network has multiple printers, check which printer you chose-it may be different from the one you think you chose. If the printer is on the network, make sure your Mac and the printer are still on the same network, the printer is turned on, and the network isn’t experiencing problems.
If your printer is connected to your Mac, make sure the printer cable is firmly connected, and the printer is plugged into an electrical outlet, and turned on.
If you’re having trouble printing, first try these suggestions: