This document provides information on credit note vouchers in Tally. It explains that credit note vouchers are used to provide credit to customers for returned goods or price adjustments. It outlines how to activate credit note vouchers in the company features menu and how to create a credit note voucher by pressing Ctrl+F8 from the accounting vouchers menu. It also describes the key elements of a credit note including specifying the purpose, making the first entry a credit to the debtor, and the second entry usually a debit to sales. Finally, it explains that credit note entries are recorded in the credit note register which can be viewed from the account books menu.