The items you mentioned above are related to the IRS and how they are processing returns.
They have procedures in place to review returns that have claimed the Recovery Rebate Credit as well as the Earned Income Credit. These both require an additional review of your return based upon the procedures in place by the IRS to deter fraud.
Why do some refunds take longer to process
Why is my refund taking longer than 21 days
TurboTax has no control over how the IRS chooses to process returns. Please see the following links as well for additional information directly from the IRS.
Recovery Rebate Credit reviews by the IRS
Information letters from the IRS regarding Recovery Rebate credits
Federal refund questions
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