Tax Question?? I need help

Im only 19 never did taxes. Im adopted and moved out at 18. My adopted mom is STILL claiming me and it erks me that idk what to do. Ive worked 3 places but only for a few months...idk how to file taxes im clueless! I called irs but as a young one i dont know who to speak too. Can i get everything my mom have gotten back?? Thanks so much