Claimed stimulus check wrong

Hello,

 

when filing for 2020, I was asked if I received the 2 stimulus checks, total of $1800, I entered I had not received the $600 check but I actually did! (Hadn’t  noticed), I’m not sure how to fix my return to reflect both checks received and fix the total amount of the refund I actually need to receive without the extra $600

 

can anyone walk me thru how to fix this error?