Composite dealer need not file GSTR 4 from FY 2019-20, they need to file CMP-08 on quarterly basis and return on annually basis. CMP-08 is going to be updated soon on portal so wait.
(1) As per Notification 21/2019 Central Tax dt. 23 April 2019, Composition Dealer is required to comply with quarterly tax payment by filing FORM CMP-08 & file yearly return for FY 2019-20 & onwards.
(2) Quarterly payment for the composition dealer is via form CMP-08.
(3) As per an update from GSTN, link for form CMP-08 for composition dealer is expected to be available after 20th July 2019.
(4) As per the update from GSTN, the last date for filing CMP-08 for the first quarter of FY 2019-20 i.e. Apr-June 2019, which was 18th July 2019 has been extended to 31st July 2019. Notification No. 34/2019 has been issued by CBIC.