General UCSD Change of major information: How to Declare or Change a Major (Undergraduates)
International Business is an uncapped major so you can change majors once enrolled and start your 1st quarter at UCSD.
https://isp.ucsd.edu/academic-resources/newlyadmitted/index.html#
Sir/Maāam, what does an uncapped major mean? Also, are you sure that Iāll be able to change my major from engineering to international business after receiving an acceptance as engineering major ? And if yes, will the change be applicable from the first day itself ??
Uncapped means not impacted. There are several majors at UCSD that are capped/impacted/selective so they are difficult to be admitted into and difficult to change into later.
Normally you have to enroll and attend 1 quarter at any school before you can officially change your major but if you are an in-coming Freshman, you will meet with your advisor and plan out the change. It should not be an issue for UCSD at least.
UCLA and UCB will be much more difficult.
You are correct in saying schools allow change in Majors. What you are missing is on how hard that may be. Trying to change into an āimpactedā / ācappedā Major means there has to an opening (like someone leaving). Often the competition for those opening is fierce.
Thatās why for UC schools, unless you get into those major (Business, Engineering, Nursing), you best look for another school to go. Privates like Stanford will let you major in whever you want, but the California Publics, itās nearly impossible.
Even for private universities, students should be sure to check the institutionās own policies for declaring or changing majors, particularly when their interests lie in popular subjects such as engineering, business, computer science, etc.
Since Stanford does not have an undergraduate business major, Iāll give another example of a selective private university in California. Here is USCās policy for a major change (āinternal transferā) to an undergraduate major in its business school: Business Administration Major | USC Marshall
If Florida is your current top choice among colleges to which you are admitted, it seems to me the pressing question is whether they have a major you would like and that you could easily switch to. Off hand it sounds like you can change to a Business major as long as you have a 3.0 GPA, but you could confirm that:
Assuming I am right, if and when you get into any colleges you would prefer if Business was an option, you can check to see how it works there.
Itās easier to go engineering to business vs. vice versa - and I believe you can major in what you want at UF. They donāt admit by major - except engineering. Double check me -
Good luck.
Edit - just read the previous message.
Are you an international applicant? If so there may be different conditions on your admission than for US applicants.
Yes, I am International applicant.
Are you now so averse to engineering that youāre ruling out the Purdue IBE program that you were admitted to? That seems like a great option that would likely allow you to switch into straight-business if you decide you really donāt want the engineering background.
As an international student, keep in mind that if you want to work in the US after you graduate, eligibility for the STEM-OPT extension may be important for you. Purdueās IBE program is one of the business-related majors that qualify. Hereās a list of currently-available business majors that are STEM-OPT eligible (sourced from here: International Student Career Resources - Purdue Business ):
BS Business Analytics and Information Management (BAIM)
BS Economics
BS Integrated Business and Engineering
BS Supply Chain Operations Management
Whereas if you switched into General Business or Accounting or Finance, you wouldnāt be eligible for the extension. I donāt know how important this is for you, but it can be a good option to keep open, since youāre STEM-friendly enough to have been planning an engineering major up until now.
No, Iām not ruling it out. In fact, itās the perfect major for me. Perfect blend indeed. I LOVE IT. Itās just that cold climate at Purdue is troubling me!!
Well, Iām sure the weather would be an adjustment, but West_Lafayette isnāt exactly Antartica, either. If Cornell is still in the running, itās even colder there!
Layers, and knowing how to use them properly, will keep you plenty comfortable in Indiana.
US schools are all in varied climates. There are 3000+ accredited universities in the US. No two are alike. None.
When you applied, to all of these schools, it never occurred to you that you could be accepted to a school with cooler winter temperatures?
People adapt to their environment and the schools accommodate students with: tunnels, 
buses, covered and underground walkways.
If you were accepted with funding, be grateful!
Buy a winter coat there, and learn to layer.