Okay! It sounds like she may have just injured it badly.
If they're from a breeder, I don't think they'd be vaccinated.
I would give her 1/2 a B Complex tablet, and Vitamin E 400IU, it should help her leg out.
She may be in pain too, so you could give her 81 grain aspirin. Give one whole thing...
So she can't use her leg at all and she won't move her foot? Will she grip your finger with her toes?
Can/will she walk?
Do you know if she's vaccinated for Marek's? Are all your other birds acting normal?
You probably don't need the vet's tape, I don't think it'll do a whole lot.