How can I direct my "REGISTER NOW" button to my website??

Is there a way to assign a URL to a button so that when they click the button I have on my form (REGISTER NOW), it will take them to my website (on Squarespace) ??????

I have inspected your form, and I did not find any "Register Now" button. If you want to label the submit button as "Register Now", and would like to redirect the user to a different page after submission, please check this guide: https://www.jotform.com/help/211-Setting-Up-the-Thank-You-Page 

If what you want is to create a button(not a submit button), so the user can be redirected to your page when it get's clicked, please see this thread: https://www.jotform.com/answers/1105533-How-can-I-add-a-button-to-an-external-page, and use Jim_R's solution.

Let us know if you need more help.