After you file

I did receive the first stimulus payment for myself and my son, I didn't receive the second stimulus payment for either myself nor my son. Turbotax questions asked about which stimulus payment I did and did not received and I answered the second one therefore the amount should have been $1,200.00 however the program filled in $1,700.00 and that exact amount was deducted from my 2020 taxes by the IRS.  If turbotax would have filled in the correct amount per my correct answers then the IRS would not have deducted anything and would have paid my full refund.  Now as it stands I will not receive any 2nd stimulus payment for myself or my son.  How do I correct this?