missing purchase bills 2017-18

Prem Kewalramani (292 Points)

27 March 2019  
Purchase Bills of 2017-18 not taken in old GSTR 3 B and are being shown in GSTR 2A..these are to be shown in GSTR 3 B of March 2019 ?...But why it is being said claim these before 31 march 2019...Without filing GSTR 3 B..how this can be claimed ..please clear my doubts..thanks