How to file vat return

kandi kumaridevi (25 Points)

19 February 2017  
i have a small kirana store, Turnover Approximately 14 Lakhs p.a. i am purchased kirana items from local guys without any vouchers/Receipts and i sale MRP Price to retail. i have no vouchers/bills/Receipts on both sales & Purchased. but i have TIN. now how to file vat returns without any bills.