This video gives an in-depth view of how sales tax logic works in the website. Includes a listing of the major parts that make sales tax work, a breakdown of how the winning tax schedule is determined, and the calculation logic used to determine the exact sales tax amount to charge on an order. It includes a walk-through of the web driver interfaces that control the core sales tax module.
NOTE: If you are using a 3rd party tax service to pull in real time rates (i.e., Avalara), you can skip ahead to the 8:44 mark of this video where we address how tax schedules are applied.