bill missed in GSTR 3B

If its on the outward side, you have to pay int and deposit at the time of GSTR-3

If its on the inward side, take the input in GSTR-2

While GSTR 3B cannot be revised, corrective adjustments can be made while filing GSTR2. However, please note the below points:

1. Input data in GSTR-2 is auto populated by system based on outward supplies mentioned by other GST providers in there GSTR-2

2. All input invoices should have GST numbers mentioned of both the supplier and recipient in order to claim the same.

what will bep percentage of interest or penalty, if i put the missed sale bill in gstr1.

you can make a bill of entry current filling month & avial the input before of 180 days from service/goods receipt.