Resident Alien vs. Nonresident Alien

The U.S. income tax return you must file as a dual-status alien depends on whether you are a resident alien or a nonresident alien at the end of the tax year.

Resident Alien at End of Year

You must file Form 1040, U.S. Individual Income Tax Return if you are a dual-status taxpayer who becomes a resident during the year and who is a U.S. resident on the last day of the tax year. Write "Dual-Status Return" across the top of the return. Attach a statement to your return to show the income for the part of the year you are a nonresident. You can use Form 1040NR, U.S. Nonresident Alien Income Tax Return or Form 1040NR-EZ, U.S. Income Tax Return for Certain Nonresident Aliens With No Dependents as the statement, but be sure to mark "Dual-Status Statement" across the top.