wrong GL Acccount is picking in Accounting document

Hi everybody ,

After my sales order gets billed, billing document and accounting document got generated. but when i see the accounting documnet --> display document.. Net price and Gross price is coming correctly with correct GL Account.

But the service tax GL Account is not coming there, Instead it is picking the Vat GL Acccount there.

where it is gone wrong? I checked in OB40 , there the exact GL Account is assigned.

Thanks in Advance,

Regards,

divya.