Gstr 3b due date for april 2021

Yes, https://www.gst.gov.in/newsandupdates/read/468

Due date is 20th May.

For taxpayers having turnover above 5 crores waiver of late fees for 15 days but interest chargeable from 21st

For taxpayers upto 5 crores late fees waived for 30 days and interest waived for 15 days

sir  please tell about Notification Number, date by which intrest has been waived. For tax payers up to 5 crore  what is Due Date without Intrest ?