🔎 Domicile is the place you plan to live in permanently. It is usually considered to be your home country.
💠If you actually plan on staying permanently in the US, you can select 'Yes' as an answer to that question, however in that case you'd be deemed as Full-Year Resident on State level and taxed as a resident on a State level. This only applies on state level and has nothing to do with your status as a resident or nonresident on a Federal level.