Rookie question – Where do I put a plugin's short code or function call?

Here is all of the instruction that came with the “contact us” plugin. Steps 1 through 3 were easy.

Here we go:

1. Upload the contact-extended folder to the /wp-content/plugins/ directory.
2. Activate the plugin through the ‘Plugins’ menu in WordPress.
3. Enter you contact information on the options page Settings > Contact Us.
4. Display the information using either the shortcodes or function calls.

I have both the shortcode and function call. I just don’t know where to put them. I have look everywhere for this information. This is for a “contact us” plugin. I just want to put it in the contact us page.

Thanks!