How To Apply Interest To A Deposit
Fastpath:
You should only have to issue adjustments to calculate and refund interest if you need to override the system's automated procedures. Refer to Controls Interest Calculation for the details.
If you need to manually apply interest to a deposit, issue an adjustment using the appropriate adjustment type. The adjustment amount should be a negative number (you are crediting the customer's deposit balance).
If you want to apply the interest to the customer's outstanding balance, refer to How To Apply A Deposit To Outstanding Debt.
If you want to cut a check for the deposit, refer to How To Refund A Deposit With A Check.