Third Economic Impact Payment Married filling jointly

Hello,

I am filling my tax - married filling jointly.  Third economic impact payment, we got $2100 for each of us. Also We got own letters from IRS which is same amount $2100 for each of us.

While I am doing my tax, looks like we are eligible to get $2800. I am able to enter paid amount- $2100- for one of us and it s giving $700 credit to my tax. 

My question is: is there any way to enter difference for both of us? or Should i expect only one of us can get $700 credit?

Other way to ask, both we got $4200 and looks like we are eligible to $5600, difference is 1400 but i do get credit only $700.