How do I go about filing my taxes this year? My situation is different.

I'm trying to file my taxes but I'm getting somewhat confused on a few things. 

A) Do I still need to check the box saying I can be claimed as a dependent? I'm 23, but haven't lived with my parents for years, I pay my own rent and other living expenses (well over half) and work full-time to do so. 

B) How do I file my college information? My parents have claimed this part for the past few years, yet I don't live with them and pay for 90% of everything I have/need. They make approximately 90K a year, so I'm not sure if claiming my schooling would benefit them more, or me more. And every time I try to file the 1098 from my university is says I'm not allowed to, most likely because of my age. 

Any help would be appreciated.