You can see these lines by looking at the detailed tax summary. To see a detailed summary of your child's return using TurboTax Online, click the first arrow below your estimated refund amount in the side panel, then select the option for View detailed tax summary.

You can also get a PDF of your child's tax return, and look at the actual forms. This TurboTax FAQ tells you how to save/print a copy of your tax return in TurboTax Online: How do I print/save a copy of my return in TurboTax Online?