International aspects make income tax preparation complex and confusing. Choosing Form 1040NR or Form 1040, other U.S. forms to file, and completing them can be puzzling for: People in the U.S. on visas; Non-U.S. citizens or residents with U.S. source income. U.S. citizens or residents who work for embassies or international organizations, or, live and work outside the U.S. 2018 tax changes (Tax Cuts and Jobs Act of 2017) are noted. Timely topics include foreigners reporting the sale of U.S. real property, 1040 filers reporting gifts from those who are not citizens or residents, and PATH Act, FATCA, and Affordable Care Act (ACA) provisions. This practical handbook can be put to immediate use by individuals and tax professionals preparing 2017 and earlier Forms 1040NR, Form 8843, Form 1040 and Forms 2555 and 1116. EZ Guides and checklists (treaties, exemptions) help clarify critical decisions. The step-by-step advice and clear explanations make for effective elections, statements, and protective returns.