Since you are using TurboTax Desktop:
Go to Forms
Right click Line 30 on your 1040 to highlight it in blue
The right click the search (the magnifying glass)
That should take you to your 1040/1040SR Wks
Repeat the steps above for that line 30
That should take you to your Recov Rebate Cr
Scroll down and edit line 13.
Enter what you received.
Line 14 will adjust for the credit.
The Recovery Rebate Credit will refund you (or lower your tax liability) for the amount of payments you did not receive but are eligible for.
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