If I took the SAT Test in my sophmore Year and scored high enough on it to put me in range for all my safety/target/reach schools, is it okay to not take it again junior year? Will colleges accept a score from sophomore year?
Colleges accept the highest SAT/ACT scores you show them. If you only take it during your Sophomore year, it will be just as accepted as if you took it your Junior or Senior year. So, yes it is okay to not take it again your Junior year. And yes, colleges will accept a score from Sophomore year.
Colleges will accept the score, but do keep in mind that being "in range" isn't always the goal. To maximize your chances at getting into a given school, you want to score around the 75th percentile of accepted scores there. I'm not sure what your score is or what schools you're targeting, but if there's room for improvement, it could always be worth taking it again! Especially because you have so much time to do so.
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I would agree. Also depends on what colleges you want to get into and how competitive they are.