Added a payment PayPal button

hi I have watched videos online about adding PayPal payment to a form 

I can get the products shipping and even a coupon but seem unable to get the submit button (which I will change to pay now) to appear.

what am I doing wrong please.

I have checked your form, and it looks like you may have accidentally deleted the Submit button. Please simply add another Submit button to your form, and the form will be able to be submitted.

You can find a new Submit button under the Basic Fields:

Please let us know whether that resolves the problem you were having. Cheers! :)