To send STP data to the ATO you will need to enable STP. If you don't want any data to be sent, you might also want to disable STP.
Firstly, you'll need to go the Settings section in the column on the left.
From there, select STP Settings.
Fill out the STP Settings and click Enable STP.
To disable STP, click on Settings in the column on the left.
Select STP Settings.
Finally, click on Disable STP.