when I tap no printers selected, it says no AirPrint printers found

Hi,

Any information about the printer? Is it an AirPrint-enabled model? If yes, make sure that the printer and the iPhone are connected to the same Wi-Fi network (router).

If there is a problem with AirPrint device discovery, and all settings are OK, you could try the following procedure (in this order, with these waiting times): Power off the Wi-Fi router, the printer, the iPhone, and all other connected devices/computers. Wait two to three minutes. Power on the router. Wait two to three minutes. Power on the printer. Wait a minute or two. Power on the iPhone. Finally, power on all other devices/computers.