@test23 You posted to a very old thread that has had no activity since 2019. We do not know what your specific issue is in regard to claiming your dependent. You lose the child tax credit when the child turns 17, but you can still claim your child as a dependent for the $500 credit for other dependents until the year they turn 19 or until they turn 24 if they are full-time students. Do you have some other questions about claiming a dependent?
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**