You need to follow these simple instructions to install the 123 setup:
Remove all the packaging from your HP Printer.
Plug your printer into the power source.
Turn on your printer.
The printer will ask you a few details such as Language, your region, and so on. Fill in all the necessary details and move ahead.
Insert the ink cartridges through the cartridge door.
Carefully insert the papers into the paper tray
The printer then will ask you to set up the connection with your system. Connect all the cables to your printer and then to your system.