This notification extends the time limit for furnishing FORM GSTR-1 by registered persons having aggregate turnover exceeding ₹1.5 crore for the months April to June 2019. Such taxpayers are required to file GSTR-1 monthly by the 11th day of the succeeding month. Time limits under sections 38 and 39 for earlier months were to be notified later.
Issued under: Section 37 read with Section 168 of the CGST Act.

Amendment:

Yes it has been amended through notification 23/2019