13 January 2019
i have missed to upload one invoice of 2017-18 in september 2018 GSTR1, how to add this invoice of 2017-18 in December 2018 qtrly GSTR1.
15 January 2019
Regarding the Skipped/missed invoice. There is no any new way to upload the invoice. You just put the same in December return as the same way as you used for december invoices.