Hi,
The formula for /4ME is as given below:
/4ME = (/449 - /4TE - /451 ) / /401
Month Edu cess = (Edu cess - Edu.cess till date - sec.89 relief) / Proj.factor.
So, the value purely depends on previous month values which you may have to
track in the system.
You can also check the RTE fields of these wage types for clarification.
As Venkatesh said, your tax calculation is happening correctly for Dec.payroll.
/460 = /4MT + /4ME + /4MH
Tax = Mon.Tax + Mon.Edu.cess + Mon.H.edu.cess
1,552.75 = 1,507.52 + 30.15 + 15.08
Regards,
Bala.