My Facebook page does not allow access to do this.

When I try to do this, the pop-up window tells me my Facebook page does not allow access to do this. How or where do I modify to allow this in my Facebook account? I have looked everywhere! Thx

Try to log out on Facebook and try adding it again. If the issue still persists, please provide the Facebook page where you want to add the form. 

Please take note that this will not work if you're viewing it using a mobile device.

u need more than 2000 fans, otherwise it wont be work

Do you still need help? You do not need to have fans in your Facebook page in order to add a jotform as shown on this guide: https://www.jotform.com/help/22-Adding-a-Form-to-Your-Facebook-Page