Well it's "Android" and JellyBean on the Note 10.1 is only released right now for Germany. So the rest of us are waiting. If you are in Germany, go to Settings>About Device>Software Update and see if it pulls anything for you. If it does you can download and install it. Chances are it'll be a few weeks before we all get it.
I think it's only officially released for Germany right now.
You can probably flash it on if you can get the firmware package. I don't know where it's available right now.