November test and october test

<p>Due to some reasons i could not take test.
Now after test date has beebn passed how can i change my test date?
Can i change it for november testing?</p>

<p>if you signed up for oct and did not come, you can take it in november if you pay a 20$ fee</p>

<p>but i dont know where to go to pay 20 $.
At which part of website?
please help me before it get too late</p>