No way if GSTR 2 is no more in FY 2017-18 In Case it's available from April for the FY 2017-18 related GSTR 2 then we can consider it... But, At the time of Audit or finalize the accounts based on Annual return they ll be show it by AO's order..
As per my View the GSTR 2 will be start from Apri-2017...