Turbo tax 2016 Deluxe: I did not get child tax credit

I have filed tax using Turbotax Deluxe 2016. I believe that Turbo tax did not guide me properly for the child tax credit. Consequently, I got my return reduced by $1000. 

 

I have original file (filed with IRS), as well amended tax return (not filed).

 

I would appreciate your help regarding revision of tax for 2016. I hope that some knowledgeable TURBOX support would help me under their100% accuracy guarantee.

 

Regards,

Dushyant