How to remove a JotForm from my Facebook page?

To remove the form you need to go to your page settings and the edit page option: 

Once there go to the tab where your form is displayed in and click on the settings button: 

You could simply hide the page or click on the edit settings link if you need to remove the tab from your Facebook Page: 

If you click on the edit settings link, you will get a pop up where you will need to click on the remove link:

Please, do not forget to save all the changes. 

Hope this helps.