SWIFT ISO 15022 - Code INCOME Financial acronyms The entire acronym collection of this site is now also available offline with this new app for iPhone and iPad. Meaning Income Report Usages Message type Field number Tag MT574.IRSLST (IRS 1441 NRA-IRS Beneficial Owners' List) 23 16R (Start of Block) MT574.IRSLST (IRS 1441 NRA-IRS Beneficial Owners' List) 27 16S (End of Block)