Currently Being ModeratedFeb 18, 2013 12:02 PM (in response to Elizabeth1214)
The fourth generation iPod Touch can run iOS 6. Was that your question?
Currently Being ModeratedFeb 27, 2013 5:54 PM (in response to Elizabeth1214)
The latest version of iOS is 6.1.2 (Feb 19th 2013) which is compatible with the iPod Touch 4th gen and later.
Connect your iPod to iTunes to download the update, or if you have iOS 5 you can go to Settings > General > Software Update on the iPod and download the update wirelessly.