✔ 最佳答案
The only PSAT that counts is the one that you take in October during 11th grade. It is the only one that counts toward National Merit scholarships, unless there are special circumstances, like starting college early. Many schools have students take practice PSAT tests so they can get used to taking the test, so when they take the test when it counts, in 11th grade, they'll be less stressed and hopefully do well.
Good luck!