GST ITC Query

Hi Valued Members,

One New Regular Tax Payer claimed some ITC in the FY 2019-20.

Some ITC matched as per GSTR2A and some ITC mismatched and after re-verification by tax payer it is found that ITC wrongly claimed in GSTR3CB.

As all 3CB and GSTR1 already filed by tax payer for FY 2019-20. Kindly guide how this ITC to be reversed or paid through challan.