How do i add a submit button

Simply drag and drop submit button to your form inside of the Form Builder. Submit button is located under Basic tab.

I have also inspected your form and it seems that you were able to resolve your issue. Your form has submit button.

Let us know if you need further assistance. 

Below is a listing of valid settings for submit buttons:

HTML EXPLANATION EXAMPLE submit   name=   value=   align=   tabindex= Submit button Name of the button. Text written on the button. Alignment of the button. Tab order of the button.

The name setting adds an internal name to the button so the program that handles the form doesn't confuse the button with the other fields.

The value setting defines what is written on the button.

The align setting defines how the button is aligned.
Valid entries are: TOP, MIDDLE, BOTTOM, RIGHT, LEFT, TEXTTOP, BASELINE, ABSMIDDLE, ABSBOTTOM. 
The alignments are explained in the image section. 
You can learn about the different alignments more

Thanks! It was totally clear on desktop but didn't see that on tablet. Much appreciated!