Child born in August 2020, can't claim the Recovery Rebate Credit for stimulus #2?

I'm using Turbotax deluxe and it won't let me claim recovery rebate credit for stimulus payment #2. I do have a valid SSN for the child that was born in August 2020. I am filing married jointly and our AGI for 2019 is 132k and 2020 is expected to be 142k. I did get a stimulus payment of 1800 (based on 2019 tax return with 1 child. In 2020 we have 2 children). 

 

What do I need to do to get Turbotax to let me claim this recovery rebate for the "missing" child? Thanks!