Withholding Tax is not calculated after validate invoice

Hi, I have a big problem, when I validate invoice, withholding tax is not calculate, I have any error. I have done all setup in payables options and i have created a withholding group and activate the option at site level for supplier.

I have done this:

1.- activate the option "use withholding tax" on payables options , At Invoice Validation Time

2.- Create Withholding Invoice" =  "At Invoice Validation Time

3.- create a withholding group

4.- create tax code

5.- create supplier like tax authority and it is active

6.- allow withholding tax at supplier level and site lvel

after this, i have created an invoice but this not working. This issue occurs with all suppliers