Hello there, CCCBuilder,

I'm glad to clear things out for you about the item description in your report.

Looks like those items are entered as inventory type in QuickBooks Desktop (QBDT). The description of your bill is coming from the Purchase Information field. While the invoice uses the Sales information description on your transaction.  See the attached screenshot below for your visual guide.

Also, the source of your invoice report are transactions, not items. That's why the item description won't show on the report and when you export it. You'll want to enter additional information in the Memo field instead to see them on the financial report.

I've added the Character limitations for fields in QuickBooks to know the maximum number of characters you can enter in each field.

Should you need additional information, don't hesitate to leave a comment below. I'm always around to help.