@daled1 , I apologize for being so late in responding to your question. Indeed, I see nothing anywhere in the IRS rules / regs/statutes that limits 2555 to one TIN ( SSN ) per tax year. But the need for one test period kind of makes it so.
I think the easiest way to do this would be to ( if the aim is to just be able to exclude the legitimate amount of FEI ), choose on test period that ends in the tax year and declare the total foreign earnings for that 2555 and the recognize the US income ( i.e. earnings for the work done while in the USA ) -- that way TurboTax has no issue, you have excluded what is legitimately excludable and IRS has collected on the US income due to them -- yes this would mean you have gone round the bend a little and if challenged, you can explain the logic by which you arrived at this . The other way would be play with absent from foreign tax home due to medical emergency ( COVID ) but I have not looked into this . I personally prefer the method I outlined above because it satisfies all the needs.
I wish I could have cleaner solution.
pk
