There are a few ways to tell if someone turned off their active status on Instagram. One way is to check their account history. If they have not posted in a few days, or if there are fewer posts from them, then they may have turned off their account. Another way to tell is to look at their followers. If there are fewer followers than usual, or if the follower count has decreased significantly, then they may have turned off their account. Finally, you can check their bio for any changes or updates that may have occurred on their account since last being active.