Click on the Settings icon
Go to "Print" > "Print..."
Fill in the pop-up dialogs with an optional job name, your username, password, etc.
Move your cursor over the left-hand portion of the screen to pull up the Charm Bar. Click on Devices
Select your printer
Fill out the print dialog as usual
You will get a notification that you need to switch to your Desktop. Click on the pop-up notification
From here, you can fill out the pop-up dialogs as above