After you file

It looks like if you enter the amount of your first and second stimulus payments in answer to these two questions it will calculate box 30 for the total of those two amount and then make you pay taxes on what you received.

 

so my box 30 should be $1800 because I received $1200 and then $600 for a dependent 

 

I am not sure why I had $2400 in that box 30 when I initially did my taxes

 

The payment I received on March 17 2021 should fall to the 21 tax year I think from what I read.