How tds to be calculated if i work more than 2 company?

jackin (Others) (53 Points)

05 March 2014  

4 and half month i worked on one company, 3 month i worked as consultant and since last 3 months i am working with another company. 

Now this present company calculating my tds by multiplying my present salary it with 12 month and then doing process so i have to pay more tds because when i worked as consultant and when i was working in past company my salary was low compared to present salary so it is right way to calculate tds ? or what are other way to calulate tds?

Also employer contribution should also be considered in my salary exemption?