Regarding hsn wise summary of outward supplies gstr-1

Indian Construction Company (97 Points)

03 August 2017  

do works-contractros have to fill table-12 (under GSTR-1 - OTHER DETAILS) HSN wise summary of outward supplies? 


we suppose, since we(works-contractors) are classified as service provider, and we are making outward supplies(reapiring a minor-bridge) to registered person(railway) with-in state, have to fill only 4A/4B/4C/6B/6C - B2BInvoices (under GSTR-1 INVOICE DETAILS)? 

are we correct ?? 

(we have attached screen-shot of two tables mentioned in this question for reference)