Hi ,
In the table V_T7INC9 you have to maintained wage type linked based upon the allowance grouping and conveyance type.
Now when you will be maintained this wage type in IT8 and maintain the correct conveyance type in the IT583 from the correct date linked with the IT8 date then Conveyance exemption will be calculated correctly if correct tax code linkage is dine with the wage type in table V_T7INT9.
Do the step correctly, it will work.
Regards,
Sankarsan