Letter writing

I have used the delevery notes tab and it will work for my perpose but would like to take out quantity. Was looking for the templat but can only see sales template.
I guess what I am trying to do is write a letter to send with their accounts and have it saved with the client

The Delivery Notes Tab is more for serial numbers and what is actually being dispatched. If you want to do a letter, I am not sure what options there are, but you might want to look at the email template and email direct from the program?