Can I register one test on online and another at the testing center?

Test Preparation SAT Subject Test Preparation
1

<p>I might retake my math II depending on the score I get next few weeks.
I 'm planning to register physics by 6th of May, but there would be
no point of registering math II if I get satisfying score. </p>

<p>So my question is, Do any of you ever register additional test at the testing place?</p>

2

<p>Yeah, some kids at the place I went to were registering to take additional subject tests on that day. I think they charged them $20.</p>