IGST Credit

Technical PG (60 Points)

22 June 2020  
i want to know about the wrong credit of IGST
In year 18-19 I have taken the rebate of IGST as CGST AND SGST BY MISTAKE..
what should i do now to correct the mistake
my turnover is 1.5 cr
we do not go through GST AUDIT
PLEASE GIVE ME A SOLUTION