how do i use itunes for my iphone ringtone?

Hi Dprior83,

Welcome to the Support Communities!

Ringtones have to be purchases on the iPhone itself, unless you created a custom ringtone in Garageband.

I've included some information below for you for both scenarios.

Here is a quick tutorial on how to purchase and assign Ringtones:

Apple - Find Out How - Music - iTunes

http://www.apple.com/findouthow/music/itunes.html#store-buyingiphoneringtones

The iPhone User Guide for iOS 7 explains how to purchase from the iTunes Store (pg. 99), and how to assign ringtones to your contacts on page 47.

http://manuals.info.apple.com/en_US/iphone_user_guide.pdf

How to create custom ringtones in GarageBand 4.1.1

http://support.apple.com/kb/HT1358

Choose Send Ringtone to iTunes from the Share menu.

In iTunes, use the Ringtones pane to select the ringtones you want to sync to iPhone.

Cheers,

Judy