Second Stimulus, Turbo Tax and Year Based on

I am concerned Turbo Tax is handling this scenario for me correctly...got my first stimulus check for $2400 and I am sure it was based on 2018 tax filing.  I then filed my taxes in 2019.  Then no second stimulus...my guess is because my income for 2019 was too high?  (I did receive a very large bonus in 2019). 

 

My question is Turbo Tax asked if I got the $1200 second round and I said no, it then deducts it from what I owe.  Is that correct?  Would both stimulus payments be based on 2018 filing?  

 

I don't want to hear from the IRS that I owe $1200 more with a penalty.

 

Thank you!