Nashik P Tax calculation in Pay Slip

There is roll out of new personnel area from 01.07.2011. This is Nasik and P Tax is applicable.

P Tax is 200 monthly and in Feb 300 rs. So total P Tax is 2500 per annum.

At the time of run PC00_M40_CEDT system shows Empmnt tax (Prof Tax)1800 rs.

It is considering P Tax from 01.07.2011. Because roll out from 01.07.2011. Instead of 2500 rs.

How system will show P Tax from 01.04.2011.