@phb33 this checkmark is important if there is a need for form 3520 ( US$100,000 threshold ). Thus I do not believe that a misplaced check mark requires the curative 1040-X ( amended return ). There is a possibility that the IRS may send you a note requesting form 3520 ( but it highly unlikely ). So no need for an amended return .
Is there more I can do for you ?
