From the Accounts Receivable screen, select the Options menu and then Change Due Date on Invoice.
At the Change Due Date on Invoice screen, enter the number of the invoice (or prepaid invoice) for which to change the due date in the Invoice Number field. If the invoice number is not known, click the down-arrow button or the Find button to select the correct one.
The date currently designated as the due date for the invoice displays in the Old Due Date field.
Enter the new date to use as the due date for the invoice in the New Due Date field. Use the mm/dd/yyyy format or click the down-arrow button to select the desired date.
Click the Execute button.
When prompted to continue, click Yes.