Gstr-1 reporting

Imran Ahmad (Working on GST with HLL & Castrol Distributor )   (118 Points)

26 July 2018  

Dear sir i have filed GSTR-1 for the month of July-2018 but some invoices related to service are forgotten to show in GSTR-1.

Counter party already taken Input GST while filing GSTR-3B. What can i do to rectify my mistake.