help with editing a page 

Thank you for your input and suggestions regarding the editing of our Wiki page.  The material that I keep attempting to post is original material from our own website. 
If I post a disclaimer on our website as per:

Usage
{{Text release
|URL = URL of the external site where the copyrighted material comes from
|Archive URL = URL of webcitation.org archive page you have created (see below)
}}

Note: This template should only be used where a compatible license has been published on the site from which the content was taken. If no compatible license has been published on the site, this template should not be used; the text will be removed. See Wikipedia:Donating copyrighted materials for an example of a usable license.

then, can I copy and paste, or paraphrase from our own website. 

Material contained on the current wikipedia web listing is inaccurate and we need to amend it.
I look forward to your feedback.