InfoPath Forms Services : Activate or deactivate a form template for a site collection

After InfoPath form has been published and uploaded to the server from SharePoint admin site in order to add the content type with in SharePoint document library it is required to activate the form in SharePoint site as below.

1. Select Site Settings

2. Under Site Collection Administration tab select Site collection features hyper link

3. On the Site Collection Features page, choose the row for the form that needs to be activated or deactivated, then select Active or Deactivate button.

References:

http://office.microsoft.com/en-gb/sharepoint-server-help/activate-or-deactivate-a-form-template-for-a-site-collection-HA010167281.aspx

http://office.microsoft.com/en-gb/sharepoint-server-help/demo-deploy-an-administrator-approved-form-template-HA010205047.aspx?CTT=3