AI, which is not guaranteed 100% accurate, offers this...
"The reason your newly typed and printed invoice is not showing in the invoice list in NCH Express Invoice is likely due to the invoice not being recorded properly in the system. Although the invoice prints and the numbering correlation works, the system requires the invoice to be recorded (saved) in order to appear in the invoice list. After entering invoice details, you must use one of the "Record" options such as "Record Only," "Record and Print," or "Record and Email" to save the invoice in the database so it appears in the invoice list for future reference. Simply printing the invoice without recording it will not add it to the invoice list.
Make sure when you finish creating the invoice, you select a Record option from the Record drop-menu at the bottom of the invoice window to properly save the invoice. If you've saved it only as a draft and not recorded it, it will not show in the invoice list. Also, verify that you refresh or reopen the invoice list after recording the invoice, as it may not update in real-time without a refresh.
In summary:
Printing alone does not add the invoice to the list.
Use "Record" or "Record and Print" to save it.
Refresh or reopen the invoice list to see the update.
If the problem persists despite recording the invoice, it could be a software glitch or interface issue for which restarting the program or contacting NCH technical support may be needed.
This information is based on official NCH software guidance and user discussions about similar issues with Express Invoice invoice list updates."