TZD0B is a standard SAP Pooled Table which is used to store Darwin: Customer default values per co.cd/trn.type for KNB1 data in SAP systems, such as SAP R/3, S/4HANA, depending on the version and release level.
The TZD0B table consists of various fields, each holding specific information or linking keys about Darwin: Customer default values per co.cd/trn.type for KNB1 data available in SAP. These include BUKRS (Company Code), GSART (Product Type), MAHNA (Dunning Procedure), BUSAB_MA (Dunning clerk)... 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. .