Wrong invoice taken in Gstr-3b

Hlo, in this first case,If tax for Feb invoice paid properly in Jan return, then there is no issue. There is no further proceedings. In the second case, missed invoice of Jan can be shown in the return of february. And also interest is to be paid for the tax liability of Jan invoice. However in recent notifications, interest is waived off subject to conditions. Kindly check that also and file the Feb return.

Sir what interest to be charged 18% or 24%?

There is waiver of interest /reduction of interest rate depending on particular type of taxpayers... kindly refer notification 31/2020-central tax

Yes it is hold good