Quotes don't appear in the Find Transactions window
You may want to use the Find Transactions window if you're searching for a specific invoice. More detailed search methods are available in the Find Transactions window than in the Sales Register. (Finding sales)
Please be aware that quotes don't appear in the Find Transactions window because they don't affect your financial numbers. They can be found using the Sales Register or the Select From List that appears in the Sales window when you enter a customer's name.