I accepted admission but now I want to back out.

I accepted admission into my preferred college and I was excited at first but now I want to desperately back out. My family is going to through some financial trouble and I recently got a really good job offer while I go to college here in my hometown. I already payed the housing deposit and I know at this point I can’t get it back but my parents say it doesn’t matter. I’m really confused because I’m not sure who to refer to in the university so I can either begin the process of backing out or see what other options I have. The school is NMSU