T621 is a standard SAP Table which is used to store Item Categories for Allocation Tables data in SAP systems, such as SAP R/3, S/4HANA, depending on the version and release level.
The T621 table consists of various fields, each holding specific information or linking keys about Item Categories for Allocation Tables data available in SAP. These include APSTP (Item category of allocation table), BSTGE (Goods recipient of vendor purchase order), UMLGE (Stock Transfer From DC to Recipients), AAFBG (Interaction Notif./Follow-on doc. generation)... See below for full list along with technical details, documentation, text table, check tables, foreign key relationships, conversion routines, relevant tcodes and example ABAP select code etc. .