First of all the Recovery Rebate Credit is really based on your 2020 AGI. The first 2 were sent out fast using your 2018 or 2019 info but were advances on your 2020 return. If you do not qualify for the Recovery Rebate Credit because of your 2020 tax situation then you will not be able to get the missed stimulus payment. But you should qualify for some since 180,000 is less than the full phase out. Seems odd you didn't get the second one. Are you sure? It may have gone to an account you don't remember or they send a debit card. . It was probably easy to miss the debit card in the mail and think it was junk mail. They have to put a trace on it. The second one should have come between Dec and March 2021. Did you get any of the letters saying how much they sent you?
Turbo Tax starts out by giving you the first 2 stimulus amounts and assuming you didn't get them. So your refund is artificially too high. Then you enter what you actually got so the starting refund was reduced or the tax due increased. Otherwise you would be getting the Stimulus amount again on your tax return.
Check your 1040 line 30. Did you get get any more?
The new 3rd Stimulus for 1400 each person is not part of your 2020 tax return. You don't enter that one. Looks like you got it in March for 1400x3=4200.
