If you haven’t already downloaded the WordPress plugin then you can do this from your my account page.
In your WordPress admin area navigate to Plugins -> Add New and click the “Upload Plugin” button:
You’ll be presented with an upload field, use this to upload the .zip file that was sent to you in the email after purchase and then click the “Install Now” button.
On the screen that appears, click the “Activate” button:
In your admin menu, navigate to Settings -> Stamp Duty Calculator:
On this page, you can change some of the options of the plugin.
Once you’re happy, it’s time to add it to a page. To do this, edit the page you want it to appear on and simply add:[stamp_duty_calculator]