Invoices Shown in IFF will not Reflect in Quarterly GSTR-1: GSTN

A professional has raised a query on twitter which is as under:

Issues in QRMP: 1.) Sales data of Jan and Feb filed through IFF, not getting auto-pupulated in GSTR-1Q.

2.) GSTR-3B table showing in all three months, Jan to March, which is confusing taxpayers as to which 3B to file. @cbic_india @Infosys_GSTN kindly clarify.

GSTN has replied to the query as under:

Invoices reported in IFF for Jan or Feb 2021 will not be reflected in quarterly GSTR-1 from Jan-March 2021. Please refer Rule-59(3) of the CGST Rules.