TDDEF_CUST is a standard SAP Table which is used to store Settings/Preassignments for Deferral data in SAP systems, such as SAP R/3, S/4HANA, depending on the version and release level.
The TDDEF_CUST table consists of various fields, each holding specific information or linking keys about Settings/Preassignments for Deferral data available in SAP. These include GSART (Product Type), BUKRS (Company Code), IINCL_KYDTE (Term Including Key Date), ISETULTKYD (Set Month-End Indicator for First Due Date)... 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. .