[JB] Changes to Previous and Contract Amounts in Job Billing

Go to JB Company Parameters and check the box to "Allow Changes to Previous and Contract Amounts". Contract Units, Contract Amount, Previous Units, and Previous Amount fields are available for input and previous and contract amounts may be changed for existing and/or new invoices. Changes to 'previous' amounts only affect the figures that print on invoices. Changes do not update General Ledger, Accounts Receivable, or Job Cost. Typically, you will only check this option when setting up the Job Billing module.

Only change the previous amounts if this is the last bill on the contract otherwise run the auto update from the first bill on the contract from the file menu.