Improvements to the tax and billing UI of the Checkout app

In this deployment, we’ve improved how we handle tax and billing information in our Checkout application. Up until now, one had to click on a different part of the UI to change the taxing country.

We realized this could create confusion among the buyers who have updated their billing information in the Credit Card or PayPal section. To simplify the UI/UX, we’ve removed the dedicated UI. Now the taxation will simply correspond to the selected billing country of the buyer.