Idea distributor how to file gst

Our Client Taken Idea Distribiutor From august 2017 they have taken GST but not filed the return till date now the idea company ask to file the GST and gave the details what are to file in GST they gave ITC Rs. =1876985 SGST - 168929 CGST - 168929  and they ask to file Output for  for Rs.449152/- SGST - 40424 CGST 40424 in the GST and in IT they have shown in Form 26AS - Rs.838900 as Commisison Income  and deduct TDS  Rs. 45000/- i want to know how file the GST  I want show the Commsiion also in GST r not