Make sure that your shoulder isn't slouching in on the turn
I always think of stepping to the outside
Outer butt cheek and let your outside heel drop lower
I have trouble with the same thing... what i try to focus on is leaning outward and severely overcorrecting myself so that when I don't think about it when i don't do it enough it is essentially the perfect position so it's correct.
Circles. And make sure you are sitting on your. Outer. Butt cheek