Excess itc utilization towards gst

I have wrongly entered GST  amount while filing GSTR 3B  for Feb'19 which is in excess of the actual GST amt, while the taxable amount is correct. ITC is utilised towards paying the GST amt, is there any way to rectify it?? Taxable amount is correctly shown, the tax amount is wrongly shown in GSTR 3B. I have amended the GSTR 1.

Actual Taxable amt is 405000/-, CGST 24300/- & SGST 24300/-

whereas in GSTR 3B i have shown it as Taxable amt 405000/-, CGST 36450/- & SGST 36450/-