Here are some links I found
See this FAQ on the Child Tax Credit
https://ttlc.intuit.com/turbotax-support/en-us/help-article/taxation/child-tax-credit/L2lNhfGDl_US_e...
Additional Child Tax Credit
https://ttlc.intuit.com/turbotax-support/en-us/help-article/taxation/additional-child-tax-credit/L6x...
IRS does my child qualify for the Child Tax Credit
Does my child/dependent qualify for the child tax credit or the credit for other dependents? | Inter...
