1- Just opened US seller account via UK seller central, my business is registered in the UK. As a limited company so when I was filling tax information I choose “ International Organisation “ and filled up all information needed. My account is verified and activated.

I just wanted to know I sell all RA & OA do I need to pay taxes or submit any other documents in order to sell USA ?

2- which courier you guys choose to send FBM TO USA and Canada from UK ?

3- can I send FBA SHIPMENT to US AMZ warehouse from UK and let AMZ deal with customs in the US port ?

Answer: I have used Amazon’s partnered courier to send a box to the US from the U.K. it was very fast and reasonable price, (better price than any price I could find by alternative couriers)

If your products can be profitable by air Mail this is a good option.

For sea freight they will not act as a clearing agent and do the customs stuff for you.

Regarding taxes I think that technically you need to register for sales tax in every state but realistically people don’t. Amazon collect the tax anyway