@mxxjoko , let me make sure I understand the situation correctly :
(a) You are a Korean ( South ) citizen in the USA on a diplomatic visa ?
(b) You work at/ for the Korean embassy/consulate
(c) You have been here in the USA for at least since 2023
(d) You have some US sourced passive earnings ( interest )
(e) You have a 1042-S from a US financial institution with whom you have filed a W-8-BEN
Question is whether you needed to file a US 1040-NR recognizing the US sourced passive income ( specifically interest from a US bank ).
While I await your response , I will refresh my memory on the US-South Korea Tax Treaty.
