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Select where the check mark is and in the blank space put $0, that will add a "0" in the blank  space on the form 8962 2b, and that`s all. 

I had the same error FDI_8962_DepLine2BEm and my taxes were rejected twice, after I did this, I received 2 hours later that my taxes were accepted, I hope this info help you to resolve the problem, not even the Turbotax employers know the answer.