The U.S. tax return filed by nonresident aliens.
Form 1040-NR is the federal income tax return for nonresident aliens, who are generally taxed only on U.S.-source income. Someone whose status changes during the year may file a dual-status return combining 1040-NR and the standard 1040. Choosing the right form follows from your residency determination.
An international student taxed as a nonresident files Form 1040-NR rather than the standard 1040.