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@lmbrian If only it were that simple. This is a very complex area of tax law and you would be well advised to seek professional assistance from a CPA, enrolled agent, or tax attorney who specializes in foreign taxes (not one who deals with this issue now and then).   That said, the complication I see is in the so-called "savings clause" in Article 4 of the treaty. It reserves the right for the US tax the worldwide income of its citizens as if the treaty were not in effect. There are a few exceptions to that in Article 5, but only, it appears to me (please verify yourself and with your own counsel) for 18(1)(b) (social security type pensions) and 18(4) (child support). So if the treaty exclusion that fits your case is 18(1)(a), for example, you have to include the income anyway if you are a US citizen.    If that is the case, all hope is not lost. Article 24(1)(a) allows a tax credit (not a deduction, but a credit!) against US tax on income on which an Irish tax was paid by a US citizen. In the US system, this is done via the foreign tax credit (FTC) on Form 1116. TurboTax can handle this, though you must be very careful to answer all the questions properly and verify that you get the results you expect by examining the forms themselves before filing. If the results are not what you expect, you need to make sure you understand what should happen, then figure out how to get the right information into TT to get the right result.  That is very doable, but it can sometimes be pretty involved.