IRS sent us a notice to indicate that our 2020 federal return is under review. Will Turbo Tax handle it if IRS raise any questions free of charge

[DoninGA]

TurboTax cannot intercede with the IRS on your behalf.  TurboTax provides tax preparation software, it is not a paid tax professional such as a CPA, EA or Tax Attorney who can contact the IRS for you.

If the IRS send you a letter or notice you can use the TurboTax Audit Support Center for assistance in understanding the notice or letter you received - https://support.turbotax.intuit.com/irs-notice/audit-support/