Hello, I've already taken the ACT (32 composite) and have been accepted to Michigan State University for Physics. Looking at other colleges though, I see that they want the SAT (especially schools like Princeton and MIT). Should I take the SAT then, even if my college doesn't require it if you take the ACT? Will I run into trouble later on like when applying to graduate school? If I decide to transfer to another university later on during my undergraduate degree and they require the SAT will I be able to take it at that time if need be? I don't know anybody who has taken the SAT so I know nothing about it, and it isn't pressed here like the ACT so I'm not sure what I should do.