[RAFAX]

The next check I would suggest to make is to find out the number of the G/L reconciliation account that is set up for the vendor that you want to post the invoice (field LFB1-AKONT). Next, find out which field status group is assigned to that G/L reconciliation account (field SKB1-FSTAG). Finally, run OBC4 and make sure that the field status group has the fields 'Withholding Tax Code' and 'Withholding Tax amounts' set up as optional entry instead of supressed.