Difference IN YURNOVER DECLARED IN GSTR 3B AND GSTR -1

GANGI NAIDU YANAMANDALA (135 Points)

16 October 2018  
while filing GSTR -3B I WAS

ENTERED OUTWARD SUPPLIES AS RS. 179400 BUT IN GSTR-1,IT WAS SHOWN AS 447900, I DONT KNOW HOW IT WAS HAPPENED, PLEASE TELL ME THE SOLUTION?