TurboTax will calculate the amount of Recovery Rebate Credit you should have received based on the information you are entered into your 2021 return. The IRS issued a Recovery Rebate Credit based on the information from your 2020 return. The IRS sent out Letter 6475 to let the taxpayers know what the IRS records show was paid to each taxpayer. The Taxpayer is asked what they received.
This is not a problem with TurboTax as the taxpayer has to enter the amount received or not received. If this amount is entered incorrectly that is not a TurboTax problem as it can only calculate based on what it is told. TurboTax has no idea what you received.
Your statement is a little confusing. I am not aware of the IRS sending out letters to taxpayers that they did not get the Recovery Rebate Credit. The Letter 6475 that was sent out to taxpayers told them what the IRS records show they received. If the IRS is not sending you the Recovery Rebate Credit (3rd stimulus check) then that tells me that you have already received the credit. To verify that they are correct, go back to your bank and look for a deposit made sometime during February or March 2021.
I have not heard that there has been a problem with this process of reconciling the Recovery Rebate Credit for the taxpayers.
