I don’t think you apply to the Stanford Dance program. You apply like everyone else to the admissions office but you can send an arts supplement. I believe such applications are due mid October and not November 1. This assumes you are applying REA.
I think there is a minor legacy advantage–if at least one of your parents was a Stanford undergrad. It sounds like this is the case here. I also think to get the legacy tip you must apply early. Stanford is not explicit about this, but it is certainly the case at other schools.
The problem with REA is that you are precluded from applying early to most other schools. To be blunt about it, I think most kids are shooting themselves in the foot by applying early to Stanford because it precludes them from applying early to other good schools that are not as hard to get into.
I obviously don’t know about your daughter. 31 is probably below the class median at Stanford. All A’s is great, but how hard/good is her secondary school? Dance sounds like a passion. If she can show national or international performance/awards that would probably help.
Feel free to send me a PM.