GSTR-1 missed sale invoice

Hello Friends

In F.Y 2018-19 Unregistered sales value of Rs. 25 lakh was missed to show in GSTR-1 even though tax was paid on such amount in GSTR 3B. How can we rectify this value either we can correct it in Annual return of F.Y 2018-19 or we should be shown it in GSTR 1 of F.Y 2019-20.
Opinion please