It depends on the definition of the employee as per your Welfare Fund Act. Since it is not a Central Act (other than the Building and Other Construction Workers Act), without knowing under which Act you have to deduct it, it is not possible to guide you properly. In general, the LWF is deducted from all employees other than those who have managerial powers functionally. By functionally, I mean not according to the designation that you have given to your employees, but based on what they do, whether they have any managerial rights, etc.