How do I fix my mom’s papers if I'm 22 and she came here illegally when I was born but went back over 10 years ago?

Depending on her situation, she might need waivers. You can start the process with I 130 petition.

Generally, if a foreign national becomes subject to the very harsh 10-year bar as a result of unlawful presence, then after an absence from the U.S. of 10 years her previous unlawful presence will not stand in the way of immigration eligibility. Of course, many additional details will determine eligibility. There really is no substitute for you and your mother 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.