E Waybill shift to bill to

4 Tax Payers.. A, B, C, & D. They deals all MS Scrap, D got a order from a manufacturer he gives to C that order as Middle Man same order C gives to B as same procedure and again B did the same thing to A. And A sales that MS Scrap to B, But despatch place and principal place of business of any tax payer not same. where despatch the item vehicle. My question is who will generate a E - Waybill with bill to shift to