I am creating a dropshipping shop with suppliers from China, to sell pet products to UK and USA customers. When I buy a product from AliExpress, I will ask you not to include the invoice, because I intend to send my own invoice to the customer via email. My question is this: if I buy a $ 40 product to China that already includes a US and UK tax, when I sell that same product at 50 or 60%, should I apply the same tax? Should I calculate it and reflect it in The invoice that you send to my client ?, or should not I include it in the invoice?
In advance, I want to thank you for listening. If any user understood these issues, I would be very grateful if I could resolve my doubt.