Hi Subha,
Check which access sequence has maintained for the condition type in OBQ1. Later check the access sequence in OBQ2 for check the table nos for the accesses maintained. After that prefix A for the table and check it in SE16/SE16N for the application TX. Suppose if the access has the table no 969 for the tax code, then check the table A969 in SE16N.
Regards,
Mukthar