Could you please check the invoice no.5-534-18834. The original /Tax Invoice amt total 155,078.69 baht not match with your Outstanding report amt total 150,538.82 baht. And credit note attached this invoice it should not be included in report.. You should be issue a separate credit note referent to invoice no.5-534-22390 instead. So, IBM may hold the payment until it has been corrected.