In case you happen to own the international Galaxy Note version (model number GT-N7000) then you’ll be able to update either via KIES or over-the-air (OTA). You’re looking for build JZO54K, which is most likely going to be rolled out in stages.
Sam Mobile says that the update is already available in Asia – specifically in Hong Kong and Taiwan – but you can expect your country to get it soon as well. Not to mention that you can always choose to manually update your device, by getting the appropriate firmware.
AT&T Galaxy Note owners, and everyone else that has a carrier-branded version, you may have to wait a while longer for your mobile operator to release the update. But it can’t be long now.
Have you officially upgraded to Android 4.1.2 Jelly Bean?