Hi Tulika, Jesus
What you want can not be achieved by segment E1WPB04, as a workaround you can consider one of the following suggestions,
- use header taxes with E1WPB07 (TAXCODE, TAXVALUE)
- use E1WPB03 and enter tax amount as condition item
- use WPUUMS IDoc type instead of WPUBON, if possible.
br,
Lalio