Login to Neartail > click on the form to open it > Edit page will open in a new tab > In the Edit page, click on the gear icon next to the Submit button > Button settings page will be displayed > click On submit > select Submit response to WhatsApp > enter the WhatsApp number and click Save. Please note that you must enter the country code when configuring the WhatsApp number. Once configured, the WhatsApp number cannot be changed. Please try this and confirm.