Customers say that invoices do not have line items, only line item amount. I cant find anywhere to turn this on or off, so dont know how to fix it

Thanks for letting us know about this matter, @gcbautomation. The option to customize invoices, where products and services can be turned on and off in the invoices that customers receive, is unavailable. The items for the invoice should appear in the invoice sent by default.

In this case, I recommend contacting our Live Support Team to proceed with the following steps and gather more information to resolve the issue.

1. From your Company file, click the Help icon.
2. Select Contact Us.
3. Enter your concern from the What can we help you with? box and click Continue.
4. Choose a way to connect, either to Chat with us or Have us call you.

For more details about the support schedule, please see the article: QuickBooks Online Support.

Also, you can visit this article for future reference in managing transactions you downloaded from your bank or entered into QuickBooks: Categorize transactions in QuickBooks Self-Employed.

Feel free to post again in this thread if you need help managing your invoices and other QuickBooks-related concerns. The Community is always here to assist you.