Sorry about the mistake.
If it is not a feature in TTX than can text and a link be added to a closed notification?
You mean you want a custom notification in the email notification that gets sent out when a ticket is closed?
Kinda...
You can modify the "ticket closed" message that gets added to the ticket as well as emailed in the notification. Search the TTXTicket.pm module. I think it's in the "ticket" subroutine.