TAX ON RUNNING(KM) ALLOWANCE

Raj kumar (111 Points)

15 April 2019  
How tax calculated on Running allowance of Railway's LOCO PILOT & GUARD. They get every month Running allowance according to their Run kilo metre in a month. like - ₹8000,₹10000,₹15000,₹20000 per month. Is there any formula?
kindly explain....