I live in Poland, I’ve never even been to the US. The amount I made is below both the American and Polish tax treshold so I don’t have any tax documents. I had to fill out a tax non-filer form, on which it says to include supporting documentation for all income sources (W-2’s, 1099’s or statements from an employer).
Now I obviously can’t get the first two since they’re exclusively American, so I figured I’d need the statement from my boss.