A couple of receipts that have already been entered and expenses created for were all bumped back into the receipt capture area AFTER the accountant filed taxes. Help!

I'll be glad to help, W-R.

To clarify, did you go the Receipts page and click the Create expense link of the downloaded receipts? If so, you can delete them if they're duplicates. 

Note: Once deleted, it can't be reverted. However, you can upload the receipts again by clicking the Upload from computer or Forward from email. 

Here are the steps:

1. Go to Banking or Transactions > Receipts.
2. Put a check mark on box of the receipts you want to delete.
3. Click on the Batch actions drop-down list and select Delete selected.
4. Hit Yes to confirm.

If you recorded the expense in QuickBooks Online first, then downloaded the receipts, you will just have to match the transactions. Here's a sample screenshot for reference:

You can read this article for more information: Capture and categorize receipts and bills.

For reconciling the account, you can check out this guide: Reconcile an account in QuickBooks Online.

Please post a reply if you have additional questions or other concerns with QuickBooks Online. Take care and stay safe.