After you file

How old was your child in 12/31/23?  Had to be UNDER 17 on Dec 31.  Or you answered a question wrong.  Go back through My Info and edit the child.if you need to fix it you will need to do an amended return.

 

How to Amend this year

https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-federal-tax-return-curr...