BBPS_EXT_CONTROL_DATA is a standard SAP Structure so does not store data like a database table does. It can be used to define the fields of other actual tables or to process "Tax substructure: tax system control data" Information within sap ABAP programs. This is done by declaring abap internal tables, work areas or database tables based on this Structure. These can then be used to store and process the required data appropriately. i.e. DATA: wa_BBPS_EXT_CONTROL_DATA TYPE BBPS_EXT_CONTROL_DATA.
The BBPS_EXT_CONTROL_DATA table consists of various fields, each holding specific information or linking keys about Tax substructure: tax system control data data available in SAP. These include SYST_VERSION (Version of the External Tax System), DB_VERSION (Tax Interface Version)... 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. .