Since the IRS has not released or finalized the Form 8915-E, you won't be able to e-file at this time. You can still efile without it however, you won't receive a waiver of the early withdrawal penalty.
Additionally, the IRS won't be accepting any efiled returns until 2/12/2021. So hopefully they will have the 8915-E ready and released by 2/12. If they don't, that's ok, as whenever the form does become available, you would just sign back into TurboTax and revisit your 1099-R and follow-up questions to make the proper election for the Penalty waiver, then you'll be able to efile your return.
