Thanks for getting back to us, @lmoore2.

Let me help you view your attachments. Aside from the maximum file size of 20MB, you'll want to double-check if you've successfully attached the file to your expense transaction. You can check it from the attachment box (see image below).

If the attachment box is blank or empty, it means you haven't successfully attached a file.

Once you've successfully attached, go back to the Expense Transaction page, the Attachment column will indicate if you have 1 or 2 attachments on a transaction. Just click the Gear icon beside the Export icon, and then put a check mark next to Attachments. Here's what it looks like.

For more information about this feature, check out this guide: QuickBooks Online attachments.

In case you need help in matching or adding transactions, check this link to go to the page. It has step-by-step instructions to guide you along: Categorize and match online bank transactions in QuickBooks Online.

Please let me know how it goes or if you have follow-up questions or concerns with attachments or expense transactions. I'll be around for you. Take care.