發票抬頭人英文關於「GUI number」標籤，搜尋引擎有相關的訊息討論：
2 Understanding Localizations for Taiwandocs.oracle.com › doc.91 › twn_und_cntry_spcfc_fty3 Setting Up Your System for GUI/VAT Processing for Taiwandocs.oracle.com › doc.91 › twn_setup_sstm_for_gui_vatGUI Numbering | SAP Help Portalhelp.sap.com › docsCloud GUI (Government Unifo