Dear Colleague,
You have to do two things:
Aspects involved in the renewal process
There are four aspects involved: Amendment, Renewal, Getting back the Security Deposit, and remitting a fresh security deposit for the amended number.
1. Apply for a renewal cum amendment in the same application form for the license for the further period, but mention to amend the number of employees to 30 from 100.
2. Practically, from my experience, for the new license, send a fresh security deposit and get back the total security deposit already remitted. This is what officials will also advise.
You may further check with the Licensing Officer and then proceed.