Hi there, Hailey4411.

Thank you for visiting the QuickBooks Community. I've got some instructions to share to ensure you'll be able to see the attached PDF option in QuickBooks Online.

The PDF Attached feature is located under the Online delivery section that can be found on the Account and settings page. You'll have to click the pencil icon so you'll be able to see the box and have the option to click for PDF Attached. I attached screenshots below for visual references.

If you're still unable to see that option after following the details above, may I ask for a specific screenshot on your QuickBooks end? This way, I'll be able to provide you with additional details.

In the meantime, I recommend logging in to your QuickBooks account using a private browser. This is to rule out the possibility of a webpage issue, and private browsing doesn't store local files or cache.

Use these keyboard shortcuts based on the browser you're using:

• For Firefox or Microsoft Edge, press Ctrl + Shift + P.
• For Chrome, press Ctrl + Shift + N.
• For Safari, hold down Command + Shift + N.

If it works in incognito, I recommend clearing the cache of your regular browser. This removes the history or log of sites so you can start with a clean slate. You can check this article to see the steps: Clear cache and cookies to fix issues when using QuickBooks Online.

If the steps above didn't work, use another supported browser as an alternative.

Lastly, you may refer to this article to view details on how QBO lets you add attachments to customer and vendor profiles, as well as their transactions: Attachments in QuickBooks Online.

I'll be right here to assist you if you have any other questions or concerns about PDF Attached. Just leave a reply below. Take care!