BobKamman
Level 15

Does this question involve someone who has formally given up US citizenship, which is a rare subcategory of "expatriate" ?  That would make the individual a nonresident alien, and the answer is that the income isn't subject to SE tax except when it is.  When I first read this, I thought "from the US" meant "from the US government," but on second thought it's probably "from someone in the US."