You can list your
Dependents under My Information.
After entering
personal information, you will answer a question asking if you have
anyone to claim as a Dependent.
This will include
children or other Qualifying Dependents.
The following link
will answer questions regarding who can be claimed as a Dependent:
https://ttlc.intuit.com/questions/3113432-who-can-i-claim-as-my-dependent?jump_to=answer_5187060