Form 5472 filing requirements apply to foreign-owned domestiC Corporations and domestic disregarded entities, as well as foreign corporations engaged in a U.S. trade or business. Complex attribution rules mean that identifying the reporting requirements can be difficult, and the penalty risk is high. Learn how to determine when a Form 5472 is required, the types of attribution rules that may apply and some of the significant issues that need to be reported on Form 5472.