You don't fill out the child tax credit form (form 8812). TurboTax (TT) automatically fills it out for you. All you do is enter the child-dependent's information in the personal information section and your W-2 for income.
If for some reason, you don't get the Child tax credit, you can have TT redo it.
In TurboTax (TT), enter at:
Federal Taxes Tab (Personal for H&B version)
Deductions & Credits
-Scroll down to:
-You and your family
-Child and other dependent's tax credit
