Note: This will only apply if you currently have the Forms Add-On. To enable, go to your profile icon, click Customer, check the “Forms Add-On” box, and click Update Customer.
Then, go to Setup, Forms, and copy your form configuration code. It will like the following code snippet but with have your site’s integration key information.
Login to WordPress and from the dashboard, click Appearance, Theme Editor.
Click footer.php under Theme Files.
Paste your form configuration code before </body>.
Click Update File.
The last and most important step – test your form!