Suggestions:
Purchase Return option is used for returning material to the supplier on account of various reasons such as damaged goods, quality difference or non-requirement, etc. The system tracks returns with reference to the Purchase receipt, updates Inventory and passes reversal of financial entry.
when voucher gets created against GRN and if Purchase return is found then system will generate single voucher for GRN and return combined. Hence he line amount of the return becomes negative and line amount of GRN becomes positive in Purchase voucher
Purchase voucher gets generated against GRN from the voucher generation process, then Voucher number of Purchase receipt gets displayed in return. Hence when the item is returned the line amount of the Purchase voucher becomes negative. The system has options in Purchase return, for a vendor to provide replacement for rejected goods or a debit note to reduce the payable position.