TZFB is a standard SAP Table which is used to store Calculation base value table data in SAP systems, such as SAP R/3, S/4HANA, depending on the version and release level.
The TZFB table consists of various fields, each holding specific information or linking keys about Calculation base value table data available in SAP. These include SBASIS (Calculation base reference), RPERFORM (Name of the Subprogram that Processes the Formula), RMODPOOL (Module Pool that Contains the Subprogram), NBFOLGE (Processing sequence of calculation bases)... 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. .