If you previously unfortunate to updated your tablet to the faulty Android 3.2 you will have to update to the new version using the Samsung Kies desktop software. If you have skipped the previous update you will be able to update to Android 3.2 Over the Air (OTA)
The official announcement from Samsung on the update follows:
Earlier this morning, Samsung began releasing an over the air software update allowing Galaxy 10.1 users to upgrade to Android 3.2 while also resolving a Wi-Fi connectivity issues some Galaxy 10.1 users experienced following a previous software update. For Galaxy 10.1 users who are experiencing Wi-Fi connectivity issues and are unable to reconnect, the new software update may be downloaded and installed via Samsung's Kies desktop app.