How to get export sales invoice entry under zero rated supply and it should reflect in GSTR1 COLUMN 6A
To understand everything about GSTR-1 reports, please refer to Section 6 of this article: https://community.intuit.com/articles/1760896-know-more-about-gstr-1-summary-and-detailed-reports-in...
Please note that all transactions i.e. Invoices and Sales Receipts are included in Section 6 to customers with GST registration type as Overseas, SEZ or Deemed Exports.
Hope this helps!