I have taken the Biology test and Math Level 2 test and received a 640 and 630. I will be taking these two tests again tomorrow, but I have not prepped since my last time taking them. Would it be a bad to take Biology and Math Level 2 for the third time?
Yes. If you’re not happy with the scores after taking it twice, assuming the first time was after/toward the end of the appropriate academic course, you’d be better served taking different Subject Tests, IMO.
If I decide that I did bad on my 2nd round of subject tests tomorrow and I decide to cancel my scores via mail, will there be zero trace that I took the tests? I could then take the same tests in November or December. I wish I could change to the SAT Reasoning Test now, but it is too late for that.
Pretty sure there would be no trace. It does look bad to take them thrice (tbh to take them more than once) but good luck!