Resident Aliens Resident aliens are generally taxed in the same way as U.S.citizens. This means that their worldwide income is subject to U.S.tax and must be reported on their U.S. tax return. Income of residentaliens is subject to the graduated tax rates that apply to U.S.citizens. Resident aliens use the Tax Table and Tax Rate Scheduleslocated in the Form 1040 instructions, which apply to U.S. citizens.