There are multiple ways this question can be interpreted. Is it an IRS form or a form you need to receive from someone else?
If you need a form that is not available, then you normally need to wait for the form to become available before you can file. If your question is that the form is available from the IRS but not included in TurboTax, then you need to obtain the form from the IRS.
In some cases, people will file a return before all their needed forms are received and then file an amendment when the forms become available. Even if we know exactly what your question refers to, we cannot give legal advice on this forum.
