Notification No 12/2017 Central Tax Rate Dated 28th June 2017 Providing Mega Exemption from CGST as amended by 21/2017 Central Tax Rate, 25/2017 Central Tax Rate, 30/2017 Central Tax Rate, 32/2017 Central Tax Rate, 47/2017 Central Tax Rate, 02/2018 Central Tax Rate, 14/2018 Central Tax Rate, 23/2018 Central Tax Rate, 28/2018 Central Tax Rate, 04/2019 Central Tax Rate, 13/2019 Central Tax Rate, 21/2019 Central Tax Rate