The 1042-S Limitation of Benefits (LOB) page defines the Limitation of Benefits categories under which a beneficial owner qualifies for a reduced rate of withholding under an income tax treaty. This table is populated as part of day zero data, based on values provided by the Internal Revenue Service (IRS), starting with 2017. LOB Codes will receive updates as updates are provided by the IRS through the annual tax release. Refer to Instructions for Form 1042-S for details on the LOB codes.