If my husband lied about his age will they forgive him and what does he have to do to fix his papers with his original age?

Significantly more information is needed in order to provide a legal analysis of whether the inaccurate information previously provided to the USCIS will be problematic and what steps need to be taken to address that. Additionally, significantly more information is needed in order to provide a legal analysis of whether your husband may be eligible to adjust status in the U.S. There really is no substitute for you and your husband 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.