Difference in ITC 8A and 2A

Hello,

We have a ITC mismatch between 8A and 2A.  We have claimed ITC only on the basis of credit shown in 2A (wherein the submit status is Y). Still there is significant difference even as on 1st May 2020 between the 8A and 2A (for the fy 19-20).  I am unable to trace the difference amount and GST grievance cell has given the 6 point standard reply.  And CBIC has asked to file as per books.

Can we file the annual return with such difference in 8A, do we have to reverse the difference (especially when we don't know which?)

thanks in advance