if you enter any override not only will you not be able to e-file. Turbotax's accuracy guarantee is void.
you need to review your input - the forms you enter the FTC credit on and page 1 of form 1116. if you entred your FTC thru 1099-div, 1099-int, k-1 FTC section you do not enter it again on form 1116.
by the way, if your total passive income FTC is less than $300 form 1116 is not required. then you do not link the input forms to the 1116
