A person registered under GST is required to file returns every month.

If you have added (and saved) invoice details on the GST Portal and want to edit, modify, add or delete details, it is best to download GSTR-1 return file and bulk edit it. Once you have made the changes, upload it back on the GST website.

Latest Updates on GSTR-1 Due Dates

Update as on 24th June 2020

The last date to file GSTR-1 without late fee has been further extended, as given below:



Annual turnover in the previous FY


Due date

Last date without late fee

GSTR – 1


More than Rs.1.5 crore

March 2020

11th Apr 2020

10th Jul 2020

April 2020

11th May 2020

24th Jul 2020

May 2020

11th Jun 2020

28th Jul 2020

June 2020

11th Jul 2020

5th Aug 2020

GSTR – 1


Less than Rs.1.5 crore and/or opted for quarterly


30th Apr 2020

17th Jul 2020


31st Jul 2020

3rd Aug 2020

Update as on 3rd April 2020

  1. No late fee shall be levied if the taxpayer files the monthly GSTR-1 for March 2020, April 2020 and May 2020 before 30th June 2020.
  2. No late fee shall be levied if the taxpayer files the quarterly GSTR-1 return for the January-March 2020 quarter before 30th June 2020.


Update as on 23rd March 2020

  1. The GSTR-1 for 2019-20 will be waived for certain taxpayers who could not opt for the special Composition Scheme ( including notification No. 2/2019-Central Tax (Rate) dated 7th March 2019) by filing Form CMP-02.

    The due date of Form GSTR-1 for July 2019 to February 2020 is extended till 24th March 2020 for taxpayers with a principal place of business in the Union Territories of Ladakh or Jammu and Kashmir. For further details, read our article on GST notifications.

  2. The due date for GSTR-1 for the period April 2020 to September 2020 is as follows:

    Quarterly return filer:

    1. April to June 2020: 31st July 2020
    2. July to September 2020: 31st October 2020

    Monthly return filer:


    Due Date

    April 2020

    11th May 2020

    May 2020

    11th June 2020

    June 2020

    11th July 2020

    July 2020

    11th August 2020

    August 2020

    11th September 2020

    September 2020

    11th October 2020


Here is a step by step guide to change invoice details:

Step 1 – Login on to the GST Portal


Step 2 – Then, go to ‘Services’ > ‘Returns’ > ‘Returns Dashboard’




Step 3 – Select the Month and Year from the drop-down.




Step 4 – Click on ‘PREPARE OFFLINE’ under GSTR 1




Step 5 – Go to ‘Download’ and click on ‘GENERATE FILE’. This request takes around 20 min.







Step 6– Now, click on ‘Click Here’ to download link. A ZIP file will be downloaded.


Step 7 – Open the file using the GST offline tool by clicking on OPEN under Open Downloaded Return file from GST portal.


make changes GSTR 1


Step 8 – To make changes, click on ‘Edit Icon’ under Action column. To delete an invoice, select the check box on the left of the invoice and click on ‘Delete’.

If the offline tool is very slow, try opening the browser on Firefox or Google Chrome by typing wp.d.cleartax.co:3010 on the address bar in the browser.


Step 9 – Once all the changes are made, click on ‘Update’. A success message will be displayed once the data is updated. The status of the details will either change to Modified (M) or Deleted (D)


Step 10 – Generate JSON file by clicking on ‘View Summary’ > ‘Generate File’ > ‘Save’.

If you are facing errors with JSON file please go through our article ‘GSTR1 JSON Errors and Resolutions’.


Step 11 – Upload the JSON file on GST Portal by going to – ‘Prepare Offline’ > ‘Upload’ > ‘Choose File’.


Step 12 – Finally, to make sure all the changes made are updated on website download the GSTR 1 file by the following Step 2 to Step 5

File GSTR-9 in 15 mins

  • Download GSTR-1, 2A, 3B and compare with books of accounts to check mismatches
  •  Auto filing on GST portal through ClearTax Chrome Assistant
File GSTR-9 Now