How to reverse itc claim

Hi,

I have query related to reversal of ITC credit.

I have wrongly taken ITC credit by mistakingly entering invoice of my another firm. The ITC was in IGST = 1,90,000.

Of the 1,90,000, around 55000 was used in offsetting IGST and around 700Rs each for CGST and SGST. Rest ~1,33,000 is in cash ledger account. 

So, can somebody please help me how I reverse this ITC credit while filing GSTR3B for June.

Thanks in advanve.