You will report this on a Form 8915-E. The IRS has not yet finalized the Form 8915-E for retirement plan distributions under the CARES act. So this form cannot be included in the TurboTax program. You will not be able to proceed until the form is available.
The IRS has not communicated when the form will be finalized for inclusion on the 2020 federal tax return.
Click Here to get on the mailing list for notification once the form is ready.
Additionally, the IRS will not start processing returns until February 12, so waiting for this form is not slowing down the processing of your return at this point.
