I get questions everyday on how to do this so here is the step by step guide on the JYP audition guide.
When you go to the JYP homepage there is a link bar click the link for audition
Once you click on the audition page scroll down to see a big blue button that says online audition
After that I will take you to a blue page that is all in Hangul. In the top right corner the last one says foreigner click that.
Now everything is into English. After that you will make a account where it says join us or you can login to your account.