There are multiple problems with Form 1116 in Turbotax. The error message you get in the email from Turbotax announcing the rejection provides clues.

My error was:

Return/ReturnData/IRS1116/ForeignTaxCreditSource - Data in the return is missing or invalid. Please double check your entries.

I found nothing on this error but you might try Googling your specific error message as circumstances may be different and you may get clues here or elsewhere. I have seen instructions for other errors like date and country errors that might work for you but there are other possibilities.

I really hope that Turbotax does a full QA review of this form. The problems with it have happened in prior years and it is ridiculous that information provided by brokerage firms and then triaged in the interview are not populated as needed and no clues are provided on steps to fix. 

Good luck.