You use it when you are filing federal and state income taxes to the Internal Revenue Service (IRS) and Oregon Department of Revenue.
ທ່ານໃຊ້ມັນໃນເວລາທີ່ທ່ານກໍາລັງຍື່ນພາສີລາຍໄດ້ຈາກລັດຖະບານກາງ ແລະ ລັດຕໍ່ໃຫ້ Internal Revenue Service (IRS) ແລະ Oregon Department of Revenue.