I have read some of this post: Sankhara - Dhamma Wheel
It says that Kamma and Sankhara are related. Goenka seems to use Sankhara in a way had appears to be synonymous with Kamma.
This word is puzzling to me. At times I have thought of it as Mental Formations = anything formed in theind like thoughts.
I see based on the mentioned article that there are several meanings.
I would appreciate some further clarification as this is an important word and concept in the Buddha’s dispensation.