Multisite test site with WHMCS Integration

Hi Guys

I've set up a new site with multisite called http://www.exampledomain.com/test/.

My WHMCS installation is here:
http://www.exampledomain.com/email/.

I am certain that Portal is set in WHMCS installation under General Settings.

I have Permalinks set to Post Name.

I've created a Page in WP with a list of all the shortcodes available.

I an access the portal home page and select order. I see products I created previously that use the cPanel Module.

Where do I specify in WHMCS Integration which products it should use? Which product group?

When I place an order, domain required, it doesn't allow the check as the TLD doesn't seem to be available. Without the TLD the search returns "sorry the domain you chose is not available..."

Am I missing something here?

Thanks
Oscar