TSTE is a standard SAP Pooled Table which is used to store Invalid will not be used anymore data in SAP systems, such as SAP R/3, S/4HANA, depending on the version and release level.
The TSTE table consists of various fields, each holding specific information or linking keys about Invalid will not be used anymore data available in SAP. These include TATYP (Tax category (sales tax, federal sales tax,...)), TAKON (Condition type for taxes), TALIZ (Structure for licenses)... 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. .