Connecting Hp printer to iPad

See this for possible help...

http://h30434.www3.hp.com/t5/ePrint-Print-Apps-Mobile-Printing-and-ePrintCenter/ ePrint-amp-Airprint-SETUP-HOW-TO-AND-TROUBLESHOOTING/td-p/1643583

I use the ePrint app on my iPad 4 to print to my HP J4680 AiO (fax, print, scan) device since the 4680 is not an AirPrint printer.

To add if your HP printer is AirPrint capable see this from Apple...

http://support.apple.com/kb/HT4356