Detail needed about rcm

I am doing Contract Work While Filing GSTR - 9 What are the head comes under RCM - I have purchaed Unregistered Material ( Bluemetal, Sand, Bricks ) , Loading & Unloading Expenses, Loading & Tranport Charges, Prepaid MObile recharges, Labour Charges, Vehicle Rent, Printing & Stationery , Repairs & Maintanance, Staff Welfare Etc.. For all these i have no bills from any party but while filing Incomne Tax i have shown Upto 1869600/- July to Marh Expenses Now What Should i do for it