Composition Taxpayers, who are facing error while trying to upload JSON file of GSTR-4 with an error report 'user has not opted-in as a composite taxpayer for the selected Quarter Period', may try again today. Hopefully your GSTR-4 will be submitted. But your return may not be filed due to technical error and you may see another error "Error! System Failure".
Comment below, if you are facing same problem or different.
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