Hi guys,
So for the SAT subject test, I signed up for Biology and Math
But coming to think about it, all I want to do is take Math tomorrow and take Biology in November!!
What do I do?? Do I not change anything to my registration and just do one test tomorrow despite registering for 2 tests? Is there a refund? Please help! Thank you
On test day, all you need to do is take Math. You won’t get your money back for Bio, but as long as you walk out of the testing session without taking Bio, you can take it on a later date, and the score will be canceled.
I was going to take Bio and US History in June, but I only took Bio and walked out. US History never showed up on my testing history and I was fine, but I did not get a refund.
All the colleges I know of allow score choice on subject tests, so just know that you can take bio (maybe as a practice run) or another subject instead (e.g. literature, no need to change registration info) and “hide” it from colleges if you’re not satisfied with it. Good luck! 
Is it too late to pay the change fee (I believe it’s $25) to switch the date? Unless you are ready to take it, don’t. If you take it and want to cancel the scores, you can’t cancel for just one test, you would have to cancel the scores for both.
Not sure if you don’t take the 2nd test if you can get a refund. Try to change it beforehand, if you can.