A recurring billing schedule can be modified only when the Sublease is not released.
Select Subleases.
Open a sublease record.
On the Billing Schedule tab, select
Recurring Billing and specify this information:
Payment Date Range
Specify the beginning and end date of the recurring
payment.
Action
Select the Modify Amounts action.
Payment Amount
Specify the new payment amount for the recurring
billing.
Click Submit. The Payment amount is
automatically updated for all the billing schedule lines that were created
through the recurring billing schedule and are within the Payment Date
Range.