I heard that you only have to submit one test score to the school you're applying to but my older brother said he had to submit all of his test scores?

I really have no clue what I want to do for a job when I graduate, I would like to get a degree in something that makes it really easy to get a job, what are the best majors for that?

I'm taking the ACT on Saturday (2 days!) and I'm wondering if anyone has any last minute advice??