For tax year 2021 the child tax credit was available for a child who was under the age 18 in 2021. If you did not claim the child as your dependent on your tax return you are Not eligible for the child tax credit in 2021.
There is not child tax credit for a child age 17 or older for tax year 2022, however there is an Other Dependent Credit of $500 if claiming the child as a dependent on a tax return.
