Let's check out what happened to your items, cjhertwig.
An inactivated item will not show up when creating invoices, sales receipts, or other transactions. Let's see if this happens to them.
Please check if the items in concern have a Make active option in the ACTION column. This means they were inactivated.
If the items we're not inactivated, we can check if this is triggered by a browser issue.
Please log in to QuickBooks in a private window and create sales transactions. If you can select the items, you can go back to your regular browser and clear its cache. If it's still the same thing, please try other browsers to isolate the case.
Please let me know how it goes.
I thank you for sharing with us the troubleshooting steps you've performed on your end, @cjhertwig.
The products and services column is displayed in your invoices and sales receipt by default. It's possible that this column was disabled on your end.
There are three ways to add columns on your sales forms.
To learn more on how to manage your product and services, you can check these articles:
Let me know if you have other questions. I'm always here to help.