Refund

Hello:

I filed my 2020 Taxes early on and got a Federal Tax refund of $4745.  However, I went back to Turbo Tax to file my GA state taxes and found my Federal refund significantly changed.  There is a higher amount showing , i.e. $6584.   How do I check and verify if I received the correct amount.  If I am eligible for the difference between the first refund and the current amount, how do I go about it? 

 

Thanks

Tom