When to apply for pt no

Respected CA Shweta Punamia ,

                                             First of all i would like to say that i am not an eligible person to answer your query , anyways Professioanl Tax is a state goverment revenue , it's rules and regulation depends on state government basis , i don't know the ptax rules of Maharashtra , but as far as WB Govt rules are concerned , i can say that , yes you need to apply for a new Professional Tax registration number with current tax submission for an employer as far as your query is concerned .

Thanks .