How to register printer to iCloud

What settings are you looking for? If you're looking for the iCloud email account settings, they're listed here: http://support.apple.com/kb/HT4864.

Printers are not registered with iCloud. What are you trying to do - it's not clear.

I believe the OP is talking about e-print, which some printers support. It works by sending an email to your printer's email address, but I believe you have to enter your email account settings in the printer for it to work.

You're welcome. Glad you were able to get it working.