The software version of the latest beta update is the same as the last one, which is N970FXXU1ZSJF and N975FXXU1ZSJF for the Galaxy Note 10 and Note 10+ respectively. The size of this update is around approx. 1800MB. It also brings the November 2019 security patch.
If you want to check for the update manually, you can do this by heading into the Settings > Software update > Download and install.