Update TXJCD for VKONT

Hello Experts,

I i need to update the Tax Jur code field thats used in Contract Acc (FKKVKP-TXJCD).

This is coming from ADRC table and hence, i need to also update the table ADRC (ADRC-TXJCD) alone without

affecting other entites like: Buss Partner. 

I tried the 2 BAPI's along with BAPI_TRANSACTION_COMMIT in sequence but failed.

BAPI_ISUACCOUNT_CHANGE,
BAPI_BUPA_ADDRESS_CHANGE

Also i tried the FM: 'ADDR_UPDATE'  and its throwing an error saying the 'address is personal'.

Can anyone help me in this regd.

Thanks