Some bill missing 2017-2018

 sir,

we filed gstr 1  qtr wise - some bill miss in this return , missed bill value Rs.325000/- ,

3 register party's bills- their take input invoice  based, now we check Income tax purpose we find out this , we not tax audit  case.  We declare our  turnover alongwith missing bills value,

now   how do missed bill file gst return , annual return (or) sep month return