I appreciate you for sharing the details of your concern, @sognvalleyfarm.

In uploading receipts in QuickBooks Online (QBO), you can only choose one expense account. However, you can split them when added in the For Review tab.

Here's an article you can read for the details (read Splits transactions between multiple accounts section): Download, Match, and Categorize your Bank Transactions in QuickBooks Online.

To answer your second question. You'll want to create a separate expense account for each vendor. This way, you can tag multiple vendors when creating an expenses or check.

Then for your third question, make sure to add the imported receipts as an expense and select the right bank account. This way, it'll find a match on the Banking page. Also, review the receipts if they have the same amount in the For Review tab.

You can also check this article for additional reference on how to manage imported receipts in QBO: Manage your Receipts in the Receipts tab.

Once done, you can now assign and categorize the transactions. I also suggest contacting your accountant for further assistance in recording this. This way, you'll be guided accordingly.

Please contact us anytime you have other concerns with your QBO. I'm always here to help.