Sales return E-way bill

The FAQ says "There is a chance that consignee or recipient may reject to take the delivery of consignment due to various reasons. Under such circumstances, the transporter can get one more e-way bill generated with the help of supplier or recipient by indicating supply as ‘Sales Return’ with relevant documents, return the goods to the supplier as per his agreement with him.".

Hence it is not clear based on which document e_waybill against sales return can be generated. However  at the e_waybill portal under "inward" supply type with sub type" sales return " Delivery Challan" is the only option to select against the Document type. Hence it can be concluded that in case of the sales return when goods are taking back by the supplier the transporter with the help of the supplier will generate one delivery challan against which the e_waybill will be generated.