change in Loan EMI

Hai

In running Indian payroll, I am trying to maintain the loan info in IT45, like total loan amount and the installments. For example loan amt is 100000 and installments with 0% int for EMI 10000 it will be 10 months to repay the loan and in payroll it takes automatically.

But client want to take after certain period say like in 5th month instead of standard 10000, it should accept amt even less than 10000 say some 8000

How to deal with this? And if we manually enter 8k for that month, what happens for that month and for the other months

Please clarify

Thank you