Dear Sharmistha,
1. You have to go through provisions of Bombay Shops & Establishments Act 1948.
2. In Maharashtra professional tax is also applicable.
3. Pl also go through Maharashtra Labour Welfare Fund Act 1953.
4. Under some of the Acts, power of making Rules has been given to the State Govts. In such cases, procedural matters may differe from State to State.
5. Other laws relating to PF, ESIC, bonus, gratuity etc. are same.
You can have an idea about various laws in Maharashtra from the following link:
Labour Law Consultancy Services - Excel Consultancy Services
Regards,