U.S Canada Tax: Taxation of Dual-Status Aliens
According to the Internal Revenue Service (IRS), a dual-status alien is a person that has been both a resident and nonresident alien of the United States in the same tax year. It has nothing to do with citizenship, and only applies to U.S. resident status for tax purposes. Dual-status tax rules are applied differently to resident and nonresident income. This type of situation could affect a Canadian that is required to file a U.S. tax return.