Problem in filing gstr 1

one of the row is not proper 

say REVERSE CHARGE fill all in N that is reverse charge not attacted 

I can't understand what are u saying

Dear  Imran  , I think  last  date  for filing  of  GSTR 1 was  10/10/2017 , I do not think  any  extension  has been given , please  confirm  with  GST  office . By  the way you can tell  your customer to  upload same   invoices in GSTR2 (last date is 30/11/2017) so  that  you can  accept ,reject or  modify  in GSTR1A after 30/11/2017.

Mr Prasad you mean to say we cant file gstr1 after due date. I am filling data in Offline Tools. It does not matter last date expire.

Either  it is offline or online   you  have  upload  this data  on GSTN portal  before  due date 

i know, but after Generating JSON file. I am facing such problem when import Excel file in Offline Tools

Please  confirm this  with  GSTN  helpdisk on GSTN portal 

I have already send this file to helpdesh, but no any reply