How to simply add Paypal account to form?

Hi, I am an editor of  manuscripts. My business process involves:

(1) The client completing an order form on my website

(2) I do the work and then return the edited manuscript via email. The email also contains an invoice via a JotForm form that describes how to pay by bank transfer. The email should also provide the option to pay directly by PayPal. In other words, there should be a button on the invoice email that the client clicks to get to the PayPal gateway.

I have followed to the letter the following instructions:  https://www.jotform.com/help/50-PayPal-Forms

However, despite this, the form looks like the screenshot below. I was forced to add a sum of 200USD even though I want the sum to be derived from the invoice form field called Total Anount Due.

Moreover, the email to the client does NOT have a PayPal button or anything that the client can click to get to PayPal. Please help.

On other platforms, you can simply create a button in the form and link that to your paypal account.

I have checked your form and it seems you have not used the PayPal Integration in your form.

Guide:https://www.jotform.com/help/391-How-to-Integrate-Form-with-Paypal-Standard-

After choosing PayPal, you can change the Payment settings to "user defined amount" to derive the sum.

Guide:https://www.jotform.com/help/275-How-to-Pass-a-Calculation-to-a-Payment-Field

Unfortunately,we do not have an option to add a PayPal button on the email. The form will be forwarded to PayPal when the form is submitted when you integrate your form with PayPal.

Hope this information helps.

If you need further assistance, let us know.