Get your taxes done using TurboTax

When you entered your new baby you needed to select she lived with your the WHOLE YEAR, even if they are born on Dec 31.  You should amend your return and get the Child Tax Credit.   I believe you can get the extra Stimulus payment when you do your 2020 return next year.  

 

How to amend a current year tax return
https://ttlc.intuit.com/community/amending/help/how-do-i-amend-my-turbotax-online-return/00/27577