For all that are having problems printing from a network printer that is attached to a computer. The drivers must be updated both on your wirelessly connected devices, as well as the device that the printer is attached to.
You must do this for both the wirelessly connected devices and the device the printer is connected to:
1) Go to the website for your printer and locate and download the latest driver installer listed as being compatible with Yosemite (OS X 10.10). If none exist, your printer company is not on the ball, and you can go ahead and defer the following steps until your printer company updates their drivers.
2) Open the System Preferences, and go to Printers & Scanners; select the offending printer and then hit the - button. Press Okay to delete it.
3) Open your hardrive>Library>Printers folder and delete the folder that is named for your printer. Enter your password to delete.
4) Open your hardrive>Library>Printers>PPDs>Contents>Resources folder and delete all files that start with the name of your printer. Enter Password to delete.
5) Install the driver by running the driver installer and following your specific instructions.
6) Open the System Preferences and select the Printers & Scanners. Then hit the + button. You should see the newly installed printer device listed. Select it, and hit Add.
7) Repeat for all devices that you want to use this printer.
8) You should now be able to print.