Amendment in certificate of registration of an establishment.

What is the process of increasing number of contract labors from the certificate of registration from 100 to 500 in Maharashtra.

You need to send an application for the increase to the labour commissioner who is looking after contract labour licenses in your area. The format is given in the state rules. With that, you need to pay the fees as provided in the rules.

In Maharashata, in most places the applications are now taken online
This page should help you https://mahakamgar.maharashtra.gov.i...act-labour.htm