Hello, sirs and madams.
I've got a problem. There's a necessity to fill in a tax code in transaction F-59 (Payment Request), but the screen-field BSEG-MWSKZ is locked for input. I've tried via OB32 specify that field BSEG-MWSKZ should always be available for input, but it resulted in nothing. Also I've looked through the rules of changing for positions of FI documents for groups of fields (fields' statuses), but haven't found even a sign of the field 'Tax Code' there.
Can you please be of any assistance to me? Thanks in advance.