On the Recovery Rebate Credit Worksheet an amount of $2,800 on Line 6 indicates that you are filing jointly with your spouse and you answered Yes to Line 2 or Line 3.
If Line 13 of the Worksheet is blank or has a 0 (zero) entered that indicates that you told the TurboTax program you did NOT receive the 3rd stimulus payment for both you and your spouse.
However, the IRS has records that show you were sent the 3rd stimulus payment so they removed the $$2,800 Recovery Rebate Credit that was entered on Form 1040 Line 30.
Go to this IRS website for your tax account to see if the 3rd stimulus payment is entered - https://www.irs.gov/payments/your-online-account
If you are Married Filing Jointly also check your spouse's tax account.
If you checked your bank account in the March - May 2021 timeframe and there is not a $2,800 EIP3 payment from the IRS then go to this IRS website for how to start a trace on the payment - https://www.irs.gov/newsroom/questions-and-answers-about-the-third-economic-impact-payment-topic-j-p...
