ESI Issue

Hello Dear Experts,

I work for INDAI payroll.

I have an issue to address and am unable to do so.

My query is:

For a few employees - There was a salary hike in the month of Apr' 15 and the gross after that was more then 15,000/-. Now because the it is 15K+, hence I considered that for these employees ESI should not be deducted and the system did the same. ESI did not got deducted.

But My client says that  - The ESI should be deducted for these employees (Though their earnings in 15K +) till Sep' 15. And this is a standard rule.

So how do I do that in the system?

Please Help me out.

Thanks

Harriss