Changing .us to .com

Hello,  I'd like to change this from from a .us  to a .com  ....    can someone help with this?

Thanks

https://form.jotform.us/Purk/2017AOLincolnFootGolfTourney

All you need to do is change the URL.  All of our domains will work.

https://form.jotform.com/Purk/2017AOLincolnFootGolfTourney