Recovery rebate for dependent not applying

I received  and qualified for both stimulus payments last year.  We had a child half way through the year and had not received the 2 stimulus payments for them.  We were supposed to receive $1100 between the 2 payments for our new dependent.  When it reviews how much we got paid it says the the $3600 we received is correct and we aren't due anymore.  How do we get that $1100 to process?