Derive your GSTR 3B data from the filed GSTR 1 return

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GSTR 3B is the monthly return prepared by taxpayer and consists of summary level data about the outward supplies, select information on purchases, tax liability, ITC claimed and settlement of taxes. GSTR 1 is the return detailing the outward supplies for the month.

Up until now, the GSTR 3B was submitted before GSTR 1.

However, the filing cycle has undergone a change starting May 2018, where the GSTR 1 return was to be submitted by 10th June 2018 and GSTR 3B is expected to be filed by 20th June 2018.

Considering this change in filing due dates, the option to derive the 3B values from GSTR 1 is released on IRIS Sapphire. Using the GSTR 1 data available in IRIS Sapphire, the relevant sections of GSTR 3B will be computed.


This computation can be done for a single GSTIN level or all GSTINs in one go.

Please note – GSTR 1 contains data pertaining to outward sales only, while GSTR 3B has other sections. The data for these other sections are not available in IRIS Sapphire and hence cannot be computed. You will need to provide the remaining data, upload the updated data and then send it to GST system.

The auto-computation of 3B is available for the users who are uploading their data at invoice level for all sections of GSTR 1. If you are uploading aggregate data for B2CS, nil and advances, the same will not get considered while deriving the sections 3.1 (a) and 3.2(a).

We hope this feature will help to ensure consistency between the data submitted in the two returns and also ease your compliance efforts.

Jump to GSTR 3B filing process

Happy Filing !!