At the present time, e-file for Form 8915B is not supported by TurboTax, and no date is given for when e-file will be supported.
On March 21, 2020 the IRS extended the filing and payment deadline until July 15, 2020. See this link for more information on the IRS filing and payment deadline extension.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
