Reviewed is one of the first steps in the IRS return processing sequence. Unfortunately TurboTax gets no information about the status of your refund. And the IRS does not notify you unless they need more information about something on your return.
In normal times, the IRS says that most filers get their refunds within 21 days from the time their tax return is accepted. That was the estimated date that TurboTax provided you when you filed your return.
Many returns are taking longer now since the IRS did not process returns for a while and there is now a big backlog of unprocessed returns.
The IRS is currently not processing any mailed returns and is not taking any phone calls.
If you efiled your return, have you confirmed that the return was submitted by TurboTax and accepted by the IRS?
https://shop.turbotax.intuit.com/efile/efile_status_lookup.jsp
If accepted, what does the IRS tracking web site say about the status of your refund?
https://www.irs.gov/refunds
Here is an IRS Q&A with information about refunds:
https://www.irs.gov/refunds/tax-season-refund-frequently-asked-questions
