Form 8879 - using it in TurboTax

I am not a paid Practitioner.  I am preparing this year's taxes for my sister who is in a nursing home. She lives in a different state than I do. How do I accomplish the same thing (getting her authorization to generate a pin for herself while I file e-file with a pin of my own) if I can't use Form 8879?

I would appreciate any help in accomplishing this task.

Thank you,

southieguy