Financial Tax register populate data on following tables.
ZX_REP_CONTEXT_T
ZX_REP_TRX_DETAIL_T
ZX_REP_ACTG_EXT_T
ZX_REP_TRX_JX_EXT_T
Which can be referred using view ZX_REP_EXTRACT_V
Report can be run using parameter SUBMIT_PURGE, which is to delete data post completion.
Purging Routine - ZX_EXTRACT_PKG.purge(p_request_id)
This routine is defined to DELETE transaction for given REQUEST ID when profile FND: Debug Log Enabled is set No.
If Post completion there is no data in above view/tables, please check if Program is subimtted with SUBMIT PURGE parameter ?
To Validate if report is generating data or not, set the profile value to YES and run the program. This will not purge the tables.