Hello - I am new to Shopify. We currently have a brick and mortor location and we drop ship all over, but this is our first online venture. We have Nexus in all 50 States due to our current business structure. We don't have physical presence in all States, however due to our drop shipping and different States rules we do have Nexus. For the tax calculations within Shopify, since it requires me to add a zip code for each State that I have Nexus in - the tax calculations will still be calculated based on the delivery address, correct? Not anything to do with the zip code I enter into Shopify as to where my physical presence is?