TA BP - Exit to filter BPTAXTYPE in table DFKKBPTAXNUM (OR bupt)

Question

Hi,
any idea how to validate user input for the taxtype? Is there any user-exit oder badi.
System ERP and CRM.
Transaction BP -> "Identification" -> Taxtype.
Or any Idea how to check via TA: BUPT
Thanx in advance?
T

Answer 1

for duplicate entries
select banfn
WERKS
matnr
menge
fistl
geber
from eban
into table iteba
where fistl = p_fistl
AND geber IN s_geber.
IF NOT iteba[] IS INITIAL.
select BWKEY
bukrs
from t001k
into table itt00
for all entries in iteba
where BWKEY = iteba-WERKS.
ENDIF.
"<<<<<<<<<<<<
sort iteba.
delete adjacent duplicates comparing all fields.
"<<<<<<<<<<<<
IF NOT iteba[] IS INITIAL.
SELECT banfn
matnr
FROM eban
INTO TABLE itmat
FOR ALL ENTRIES IN iteba
WHERE matnr = iteba-matnr
AND banfn = iteba-banfn.
ENDIF.
ENDFORM. " datafetch