<p>So, I registered for Math II but now I have realized that I cannot handle the Math II but can easily handle Math I. I know that it is possible to change the subject on the test day.</p>
<p>What is the procedure for doing so? Is any cost involved? </p>
<p>PS- My test is on Saturday. Please help!!!</p>
<p>No extensive procedure, no change in cost. You select the tests that you want to take on test day. You can take as many tests and whatever tests you want (if you take more tests than you paid for, you will be billed at a later date). You will not receive a refund if you take less tests than you paid for.</p>