In order to have a clear idea about Credit note settings, Go through Purchase Order Settings.
Apart from the fields that are similar to the ones in purchase orders the remaining fields that exist in Credit Note settings are discussed below,
Company name on credit note: Name of your company that is to be displayed on your credit note page.
Company address : Address of your company
Authorized person: Name of the person who has authority over the company.
Authorized person Designation : Designation of your Authorized person.
Authorized person signature : Authorized person signature.
Credit note Logo: credit note logo which is to be displayed on the credit note page.
Add to expense credit note: If Yes, amount is added to the Expense module.