Hi there, virginia5.

Let's figure out why the invoice template imported in QuickBooks Online only shows the first line item.

There is a possibility that the uploaded template is corrupted. Let's try re-importing the invoice template and see how it works.

Here's how:

1. Go to Gear icon.
2. Under Your Company, choose Custom Form Styles.
3. At the top right, select the New style drop-down.
4. Choose Import style.
5. Select a form type.
6. Select the Save and upload your file field, then locate your DOCX template.
7. Select Next.

Let me share with you this article to learn more about importing invoice template: Import custom form styles for invoices or estimates.

Keep me posted on how it goes. Don't hesitate to leave a comment below if you have any other questions. I'll be always around to lend a helping hand.