Hi Manoj (tjjkj)
Sorry to see that no one has replied to you yet. To create a credit note you would generally do that by reversing the sale instead of deleting it, to ensure the history of - the payment being made then credited or refunded is shown in the software.
In Accountright you would do this by opening the sale, then clicking edit > reverse sale (It may be different depending on the software).
See Help Article: Customer returns, credits and refunds for more information on that topic.
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