What is GSTR 3B?

The GSTR-3B is a consolidated summary return of inward and outward supplies that the Government of India has introduced as a way to relax the requirements for businesses that have recently transitioned to GST.
Since a lot of small and medium businesses have been using manual accounting methods, filing returns within the July 2017 deadlines would be difficult for many of these businesses. Hence, from July 2017 to June 2018, tax payments will be based on a simple return called the GSTR-3B.

When to file GSTR-3B?

The GSTR-3B for a particular month should be filed by the 20th of the following month. For example, GSTR-3B for July should be filed by the 20th of August, and the GSTR-3B for the month of August should be filed by the 20th of September and so on. This deadline applies to every month till June 2018.