Add
{{--*/ $i = 0; /*--}} @foreach($osbills as $row) {{--*/ $i++; /*--}} @endforeach

Invoice No	Invoice Date	Tag	Type	Assign Amount	Balance
{{ $row->reference_no }}	{{ date('d-m-Y', strtotime($row->tr_date)) }}	@if($row->is_edit=='E') @else @endif	{{$row->tr_type}}	@if($type=='CUSTOMER') @else @endif	{{ number_format($row->balance_amount,2) }}