Solution Needed

1) GSTR2A is Dynamic statement changing constantly , every day .
GSTR2B is Static statement , remain constant no changes .

2) GSTR2A dose not provide any bifurcation
GSTR2B provide bifurcation .

3) when supplier file the return of privious period , ITC will reflect in GSTR2A in previous period for i.e If supplier file return for the month of April in July ,ITC will reflect in April GSTR2A .
However in case of GSTR2B , when supplier file return for the month of April in July then ITC of April will reflect in the month of July only in GSTR2B .

But what shows in gstr 2b that only we should have to claim??

Only Your purchase details as per books of accounts , reflected in GSTR2B that you have to
claim of course you have to fulfill all other conditions too as per CGST act to claim Input
tax credit .

Why some times Gstr 2a invoices are not in gstr 2 b?

Coz gstr 2b is a static report taking only those invoices which are filed between 2 dates.

Oh ..GSTR 2 b takes only the before due date filing invoices??? after due date limit if I filed means is it shown in GSTR 2A ???