Hi Rohit,
Would you be able to provide USTAX call for BSI interface (make sure it has no client specific data like EIN or employee name) and tax calculation screenshots along with employees' resident & work tax areas.
I would also like to know date of wage type input and in what infotype along with date on which you are running payroll and payroll type too.
It would be great if you could also provide UPAR1 paramters call in schema before USTAX call.
Thanks,
Ameet