[1] In this context, including foreign businesses that file a U.S. tax return. [2] Note that for FATCA purposes, if a person is a US taxpayer for any portion of the year, they are subject to FATCA compliance purposes for that tax year no matter how much of that year was actually spent as a US taxpayer. However, if they are not a US taxpayer at the end of the year, they would not be subject to FATCA compliance for the following year.