Specify the bill number of the invoice to review/edit. Press F4 for a list of valid bill numbers. If adding a new billing, enter “N” or "New" to have the system assign the next sequential bill number.

• If you specify a billing in a closed month, a warning displays (in blue) at the top of the form. You can make changes to 'closed-month' billings; however, you cannot add or delete billings in a closed month.

• If you specify/add a billing, and future billings exist for that contract/customer, a warning displays (in red) at the top of the form.