Bills Missed Out.

I have one sale bill of November 2017 which i have omitted to put in gstr 3b and gstr 1 on which tax liability is 49000/- in sgst and 49000/- in cgst.
At the end of novemeber i have gst itc available is 75000/- in cgst and 20000/- in sgst.
now i want to show the bill in june return.
so if i ll pay interest, how to calculate interest and on which amount? and whether interest is paid to both or to only sgst???