Filing of Annual Return ( FORM GSTR-9A ) for FY 2017-18 and FY 2018-19 for the Composition Scheme Dealers has been made "OPTIONAL". The same was clarified via Circular No. 124/43/2019 - GST, dated 18th November 2019.
And note that Composition Scheme Dealers can have turnover upto Rs. 1.5 crores.
As per Notification No. 47/2019 - Central Tax, dated 09th October 2019, Filing of Annual Return i.e. FORM GSTR-9 under Section 44(1) of the CGST Act 2017 for "FY 2017-18 and FY 2018-19" has been made "OPTIONAL".
The same was also clarified by CBIC via Circular No. 124/43/2019 - GST, dated 18th November 2019.
It shall be "deemed to be filed" on the due date if not filed by the taxable person.