It depends on the school.
At schools that admit by major and/or cap majors, it can be very difficult or impossible to move to business or CS.
Consider liberal arts schools where students don’t have to declare majors until second semester soph year. At these schools it is generally easier to change majors too. Although depending on the timing of the change, extra semesters can be necessary to complete requirements.
If you want to share more about what your kid is looking for, posters can make some more sprecific suggestions.