GSTR-2A was merely a functionality tool as to whether supplied has filed his return. However, recipient nowhere was restricted to avail the ITC if supplier fails to file GSTR-1. So far as availment is concerned, conditions of Section 16 read with Section 17(5) has to be analysed. There is Press release issued by Govt. of India to this effect. Various writs have been filed, outcome of which is still pending.
Recipient can avail ITC on the basis of tax invoice and on fulfillment of other conditions.
Further, mandatory review of GSTR-2A is necessary only w.e.f 9 October 2019.