Deductions & credits

In my case when I go to the IRS site it shows we am entitled to the 1400 each for my wife and I.   The 6475 Letter states we were issues 1400 each, but we are positive we received only a total of 600.  That part of the forms in Turbo Tax is a bit confusing, at least to me.  I think there should be some definitive spot to select that we received less than what the IRS says we are due AND what was received.   For me it should mean we are due an additional credit of 2200 to get to the 2800 due.  It might delay my refund or processing of my return but it is significant enough that I must.  Sam