Thanks again @jtax, I followed your promts through and, unfortunately, even after an hour on videoconference with a TurboTax specialist, there appeared to be no way to accomplish my two goals: To pay Social Security and Medicare contributions on both my US income and my Foreign earnings as a self-employed educator, while avoiding double-income taxation on the foreign earnings (I am already paying Italian tax but not Italian Social Security on these earnings, per the Totalization agreement). It seems that I must either pay taxes AND SS on the foreign income - the formula you proposed - or accept the income exclusion on the foreign earnings and effectively pay neither US nor Italian Social Security - not good for my long term Social Security compensation rate. At least wihin the limits of TurboTax software these are the only two options. I am awaiting reply to a written inquiry on this directly from SSA.
