The U.S. IRS has published updated guidance on Withholding of Tax on Nonresident Aliens and Foreign Entities (Publication 515). The updated Publication is for use in 2015, but also contains information for 2014. It covers a number of topics, including: Withholding of tax, including agent requirements; Persons subject to withholding; Reporting obligations; Documentation requirements; Beneficial owners and the claiming of treaty benefits; Foreign intermediaries and foreign flow-through entities; Income subject to withholding, including specific income types; Depositing withheld tax; Return filing requirements; and Tax treaty rate tables Click the following link for Publication 515.