What if you dont take the PSATs and you are a junior?

If you don't take the PSAT it is not a big deal. The only thing the PSAT is really used for is the National Merit Scholars, which are only about the top half of the top 1% of students who take the test. Otherwise, it is just a test and the score will not affect your college admissions (I don't even remember submitting them to anyone...). So, if you missed the PSAT, no biggie; don't worry about it. :)