The Central Board of Indirect Taxes and Customs Vide Press Release dated 7th December 2018 has decided to extend the due date for filing FORM GSTR-9, FORM GSTR-9A (Annual Returns) and FORM GSTR-9C (Reconciliation statement) till 31st March, 2019.
http://cbic.gov.in/resources//htdocscbec/pressrelease/Press_Release_0712.pdf;jsessionid= 5BE64F15B1F45883BFA021486D1ED66E