Maharashtra Profession Tax Rules On Stipend

I have joined my present company in Jan 2009 on probation.
I was about to get stipend till I get confirmed. Now in Jan 2010
I was confirmed. Now our HR people tell that I have to pay profesion tax
for the full year, i.e. from April 09 to March 10, total Rs. 2500/- and they have also started deduction P.T. from Jan. 10. They will 2500 in 3 instalments. My question is whether I have pay full year's PT?
During my probation they have deducted any PT and not evern informed me the above rule. Please let me advise what I have to do in this regard.
Pururvash Dave

it is mandatory to deduct ptax in states as declared by govt. and the amt varies from state to state. for maharashtra it is Rs.2500p.a for salary above Rs.10000/-p.m

in maharastra Proff tax per month salary/wages/stipend of Rs. 2500 to 3500 P T Rs. 60/-, 3500 to 5000 Rs. 120 , Rs 5000 to 10000 Rs 175 & if any month above Rs 10000 P T Rs.200/- & Month of Feb P T Rs. 300/- & or yearly 2500 salary above 10000/- in finacial year ,