I am afraid I could not understand what you mean by US sourced/connected income.
I do online sales to worldwide. So there are also buyers from US, infact most of the buyers are from US. I do dropshipping so the items are shipped from outside US, no production in US, just the marketing. Besides, the marketplaces which I sale products, collect the States' VATs (where applicable) from me.
I pay VATs and fees to the marketplaces for each sales.
Since, I have a LLC formed in US, I believe that I have a US sourced/connected income.
By the way, EIN was given while I was forming my LLC although I do not have any employee. How can I file returns with the EIN?
