First subscribe to the site.
Click the download button at the top right corner of the pdf document below.
Navigate to the downloaded file on your computer and open it with Adobe Acrobat.
You can print it to fill out manually or fill it out using Adobe Acrobat or another program. How to fill in and sign a PDF form with Adobe https://www.adobe.com/uk/acrobat/how-to/fill-sign-pdf-forms-electronically.html
When your application is processed and approved your subscription to the site will be made active, and you will receive an email to Login.
Post the completed form to:
Birdtalk Bird Products
PO Box 146
Canungra QLD 4275