You should seriously think about taking the Math Level 2 exam in June. I've talked with a bunch of moms this past month who were unaware that the SAT Subject Math Level 2 exam is essentially a very tough PreCalc final exam. You should not until after Calculus to take this exam because there are so many concepts in PreCalc that will go stale as you move through Calc.
I've given this advice to many students and parents over the years and have never come to regret it. Certainly if you otherwise have plans for the June SAT administration, you should think about taking the test in August.
I shot this PSA while charging my car yesterday. Enjoy!