If your tax liability is zero, then you are not eligible for any child tax credit. That's when the "Additional Child Tax Credit" (ACTC) kicks in. You can trust the TurboTax calculations.
If you qualify for the Child Tax Credit but do not receive the full amount, and if your earned income is greater than $3,000, you might be eligible for the ACTC. The amount will vary from $1 if your earned income was $3,004, up to $1,000 if your earned income was approximately $9,999 or more.
