Trn-1 online submission

GST Authority Not Yet Introduce TRN-1 in their Portal... But there is mandatory to submit online TRN-1 through GST Portal for carry forward of closing balance of  Cenvat/Vat to ITC electronic register... But some experts giving opinion that it is auto populate systems which generate from June17 submmited return and not for mandatory to submit online TRN-1

Question: what is true ??? .......... 20/8 is coming shortly .. There is any possibility to introduce TRN-1 at portal before 20/8

Please reply