GST SALES INVOICE

Sagar Sahu (22 Points)

12 September 2018  
I have generated an sales invoice against a proprietor in the. month of July. But , in actual there is no any sale between us on that month. The invoice generated by mistake . and the party has no any purchase invoice of that month of our sales invoice.
And we & that party returned the file of that month . So , what can we do.? How to solve this problem?