Gstr4 filled wrongly for an composition dealer

No, GSTR4 cannot be revised. The details which have been entered incorrectly can be amended in the next period GSTR-4 return. GSTR4 provides for amendment of the details furnished in previous tax periods.

Yes GSTR-4 cannot be revised. amendments may be made in next quarter GSTR-4 only but in the meanwhile you may discharge the tax liability of Q3 by paying tax.

First you should pay tax then there will be no liability for tax and no question of interest arises then in next quarter you can file correct GSTR 4 As mentioned above