how do i make a family attack itself?

How can I do it (using the turret behavior)Does a family attack itself if they are not on the same team?

You will need to disable automatic targeting and use "Acquire target" action instead. For example:

for each idle turret -> pick enemy turrets in range -> pick nearest of them -> acquire it as a target.

That didn't help much,

Did you try my suggestion?

dropbox.com/scl/fi/zp85ibb18bs4846jrgdau/TurretTeams.c3p