For tax year 2022 a child who is age 17 or older is not eligible for the Child Tax Credit. They are only eligible for the Other Dependent credit of $500.
Look at your tax return in the dependent section on page 1 of the Form 1040 shows if the dependent is eligible for the CTC or ODC.
To access your current or prior year online tax returns sign onto the TurboTax website with the User ID you used to create the account - https://myturbotax.intuit.com/
Scroll down to the bottom of the screen and on the section Your tax returns & documents. Click on the Year and Click on Download/print return (PDF)
Or -
When you sign onto your online account and land on the Tax Home web page, scroll down and click on Add a state.
This will take you back to the 2022 online tax return.
Click on Tax Tools on the left side of the online program screen. Then click on Print Center. Then click on Print, save or preview this year's return. Choose the option Include government and TurboTax worksheets
The child tax credit rules for 2021 tax returns were unique to tax year 2021; you could receive the CTC even if you did not have any income earned from working. And a child could be 17 (under 18).
That will not be the case for tax year 2022. For tax year 2022, the rules revert back to the requirement to have income earned from working in order to receive the refundable part of the CTC. If you do not have at least $2500 of income from working you will not get the CTC or the additional child tax credit. And the age cutoff went back to under 17 (not 18).