Essay format - quick responses please

I got to mail in my stuff tonight / tomorrow, so I would like to know how you are supposed to format your essay. Particularly: Single-spaced? What do you put at the top, name, SS# right? And you place the college’s name above everything in the center? Should you bolden / make larger the college’s name / your name / your ss# than the rest of the essay?
And do you put anything else other than the college’s name, your name, your ss# on the essay, or is that all?