Missed supply invoices in gst

Sir,

In gstr-1, i had filed all the months for the f.y.2017-18 except July-2017. But i shown 3B filing. While compare in Gstr-9, july month gstr-1 is as nil return, but supply invoice is rs.376400. How can i show and where the missed invoice amount in Gstr-9. kindly advise.