How To Add An Adjustment (or Payment) To A Completed Bill

If you want to add an adjustment to a completed bill perform the following steps:

You can add a payment to a bill using an analogous approach - Add the payment, Reopen the bill, Complete the bill.

Note:

Cannot reopen historical bills. You may only reopen an account's most recent bill because recompleting the bill causes the ending-balance to change, and we don't want this to happen to historical bills.