Wrongly filed gstr3b

Dear Sir
Facts : I have filed the GSTR3b for 2018 showing zero output liability and zero input credit. Whereas my credit ledger under GSTR2A is showing available credit for the month as
January-18     
IGST                   CGST             SGST
48,669.00     81,913.29     81,913.29
Which I also Admit is true and is available for that I have relevant purchase register and tax invoices.

Also my liability for the month is showing zero in return but I admit my liabilty of CGST & SGST to the extent of Rupees CGST 78460 & SGST 78460.

I have filed all my GSTR3B till date and has not taken this into affect.
Yet I have to file my GSTR1 & GSTR9 for the relevant period.