You can only change your major when you are a sophomore. Of course, some people change as soon as they go to college, but it is said that they will study this major or drop out of school, so the college will let them change. Changing majors requires an exam. Each college has different requirements, and it depends on the situation to transfer professional knowledge. (However, after the transfer, freshmen and sophomores will have classes together, and the time is very crowded. Some majors with top-notch plans will recruit top-notch talents from other institutions when selecting top-notch talents, but these people are really excellent. As far as our college is concerned, they transferred from school in their freshman year. Changing your major depends on where you want to transfer, but it doesn't seem difficult.
-the above is only observed from the perspective of a bystander, and there may be some inaccuracies.