Following on from my other thread about Expat H&R block, they calculated 2 methods for my taxes it seems. The first, using standard 1116 for all of my combined income and total tax credited to reduce owed taxes to 0. As I have 2 USC children dependents, and MFJ, this gives additional CTC refund.
The second way was more sophisticated. This involved reducing my gross income for 2021 by applying a portion of income under 2555/FEIE, then the remaining through 1116 tax credits. This meant because I would be filing 2555 I could not claim the additional CTC, HOWEVER, what it has done is to reduce my taxable income down to below the threshold for Stimulus payment 3 eligibility.
As such, they now calculate I get a refund of 4 x $1400 (4 USC for household) as a rebate credit which is doubling my expected refund if I were to go 1116 route and get additional CTC alone.
My question is this seems like a loophole that makes some sense logically (with respect to it "working" using the strict criteria), however what I want to know is what are the downsides, if any, to using the FEIE on my 2021 return? I will not want to use it next year as there will be no rebate likely to apply for and I would want to claim the ACTC. I am unsure of the rules on switching between the two. When I first started filing, I exclusively used form 2555, but then in 2015 I realised the downside of this as I wasn't building up credits, and then subsequently couldn't get the ACTC, so I revoked the FEIE back in 2015 and have filed 1116 ever since exclusively.
Any thoughts on this? Many thanks in advance.