My intended majors are International Business or Business Administration/Management. What are some AP courses that could come in handy/get me credit for my intended majors?
Probably both English APs (especially Lang). In order to be a successful business person, you’ll need to know how to communicate effectively.
AP Econ and maybe AP Gov could also come in handy for business.
Some suggestions, depending on your interests: calculus, computer science, economics, English, foreign language, history, psychology, statistics.
I would recommend taking AP classes whose exams would fulfill general education requirements. When it comes to major requirements, AP classes may not be advanced enough. But this depends on your school, so you should look on their website. (If you haven’t chosen a college, look at the ones you’re considering.)