Hello, BrendanDub.<!--EZCODE BR START--><!--EZCODE BR END--><!--EZCODE BR START--><!--EZCODE BR END-->If you submitted an IRS W-8BEN to the payer of the interest, Uncle Sam has no claim to tax in that you are Irish. All this bumpf is covered in a bilateral tax treaty between Ireland and the USA.<!--EZCODE BR START--><!--EZCODE BR END--><!--EZCODE BR START--><!--EZCODE BR END-->If you submitted a Social Security Number and acted as if you were local, then the payer would be sending you a 1099OID form and the IRS an electronic lovenote about your gain.<!--EZCODE BR START--><!--EZCODE BR END--><!--EZCODE BR START--><!--EZCODE BR END-->What does this mean? If are a W-8 kinda person and you wish to ignore the 20% owed the Revenue Commissioners, do so at your own peril. Uncle Sam will leave you to it (there is some mention of co-ordination of tax info, but I am not confident this is actually working). But if you have a 1099OID to hand and do not file an IRS 1040/A/E/EZ and someday re-enter the USA, don't be surprised if the Homeland Security goons, the INS and the IRS want to have a chat with you at some undisclosed federally-owned location.<!--EZCODE BR START--><!--EZCODE BR END--><!--EZCODE BR START--><!--EZCODE BR END-->Best of luck!