How do I add a submit button to the form?

I put a registration form on my Facebook page, and there is no way for people to submit the form after filling it out. How do I add a submit button?

I have checked your facebook page and see that the form is already having a Submit button. It looks like that you have figured out the issue and fixed it.

Let us know if you are referring something different. We will be happy to assist. 

Yes, I did. Thank you!