I have no clue when to take it
This might help: https://www.studyusa.com/en/a/1381/when-should-i-take-the-toefl-exam and https://www.bestmytest.com/blog/toefl/best-time-take-toefl.
It really comes down to you making sure you have enough time to get your scores to send to colleges. If you're in 10th grade right now I would suggest taking it sometime during your 11th grade. You'll have time to learn more and study if necessary and will also have plenty of time to retake the test if needed.
hi! TOEFL score is valid for 2 years. I took it last November and only took it once!
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