What percent AA do I have to be to apply as one?

I think of myself as multiracial before anyone asks me what ‘one ethnicity’ to try and pigeonhole myself in

I’m also curious, although somewhat disadvantaged, my parents ended up doing fairly well financially, does one HAVE To take scholarships that they might not feel are warranted?

Lastly does applying as a minority to GRADUATE programs help or hurt? I hear mix things

You can select as many races as you like on the common ap.

You can decline financial aid.