Will I be able to fix my dad's papers even if his not on my birth certificate?

Significantly more information is needed in order to provide a legal analysis of whether you will be able to sponsor your father for immigration once you reach age 21 (the earliest point at which a U.S. citizen may sponsor a parent). This includes, for example, information about how and when your father entered the U.S., information about any immigration-related applications or actions ever taken by or about your father, etc., etc. Additionally, a DNA test may be needed to prove paternity. There really is no substitute for you and your father to consult with an immigration attorney who, after learning all of the relevant information, could advise about eligibilities, options and strategies to attain your goals, and who then could offer legal representation in the often complex application process.