Copying or Revising a Quote
There are two ways to create a quote based on an existing quote:
This task is a step in Process of Creating Quotes.
Note: The user can use the Quote screen to create a new opportunity
associated with an existing or new account. The user cannot use the
Quotes screen to edit any existing opportunity or account. The user
cannot change the association between any existing opportunity and
account, but the user can associate a different opportunity or account
with the quote.