to automate Transportation allowance

Hi everyone,

Please guide me to fulfill the client's requirement. We have 9TRN wage type as earning part, 9TXX (Transportation Allw. Exmp) is under /130, Tax slab code is STRN. we have mapped all this in respective table to get it under exemption and currently, it is calculating fine and displayed on payslip also. now, the User don't want to maintain the infotype 0582 with subtype STRN. is it possible to make it automatic under /130 instead of maintaining it for all employees?

Thanks in advance.