Hi CrisPete,

Thank you for posting here in the Community. Allow me to step in and help you with adding custom fields in QuickBooks Desktop.

Yes, you can customize the template layout to enable the custom fields you need. Here's how:

1. Click the Lists tab at the top menu bar.
2. Select Templates.
3. Double-click the template.
4. Click Additional Customization.
5. Go to the Columns tab.
6. Put a check mark next to Other 1 and Other 2.
7. Enter a name for the custom columns.
8. Click OK.

For your visual guide, I'm attaching the screenshots I recommend:

I'm linking an article with additional information on this, such as customizing form templates:

Use and customize form templates.

Please feel free to get in touch with me here for any additional questions you may have about the templates. The Community always has your back.