In the My Info section of TurboTax, you are asked Affected by the 2017 Hurricanes? Make sure to answer Yes to this question.
You cannot e-file and include a statement using the TurboTax Online version. You will need to mail your tax return to do so. However, you can e-file and include the statement using the TurboTax Deluxe desktop version.
See the TurboTax FAQ below for more information on disaster relief. Click "See entire answer" for the full page view.
https://ttlc.intuit.com/replies/6395931
