Hello Michael,
As per SAP note:
2101719 - BSI: Sync. Payroll Tax Data dependencies on BSI Tax Type mappings
From now on, the BTXTAX, BTXTAXT,and T5UTT tables will no longer be updated by the Synchronize Payroll Tax Data report. This eliminates the dependency on the tax type mappings in the BSI TaxFactory instance. The updates to the BTXTAXT and T5UTT tables will be provided in a separate SAP Note whenever BSI releases a new tax type in a Regulatory Bulletin. Table BTXTAX is no longer used by the system and its maintenance will therefore be deprecated.
Hope this clarifies,
Kind regards,
Graziela