Can you tell me how to add back in a deleted reconciliation adjustment that is a NEGATIVE $80,000.

Hello @jay33,

Welcome to the Community. I can share some information about entering adjusting entries in QuickBooks Online. 

QuickBooks allows you to create an adjusting entry at the end of the reconciliation to force the account to balance. The Add adjusting entry option will show up after you finish a reconciliation that isn't balanced.

Here's how:

1. Go to the Accounting menu and go to the Reconcile tab.
2. Reconcile your account.
3. After you've reviewed everything for errors, click Start reconciling. 
4. Select Finish now from the dropdown.
5. Click Done.
6. You'll see a message explaining that your account isn't balanced, select the Add adjusting entry link.

The adjustment entry is part of the previously reconciled transactions. Our system will base the amount on the difference at the end of the reconciliation.

Since the entry is deleted, you have the option to re-enter it through the steps above. If you're unable to perform the process, you can have an accountant undo the reconciliation using the QuickBooks Online Accountant version.

Check out this link for more information about adding reconciliation adjustment: Enter an adjusting entry for a reconciliation in QuickBooks Online.

Also, the way you can enter the information back into QuickBooks will depend on how you created the adjustments. You have the option to go through the Audit Log report to check the transaction type and the details. The information will help re-enter your data back into our system.

For additional reference, I've attached an article you can use about how to view adjusting entries using the Search function in QuickBooks: Find previous reconciled adjustments.

Feel free to hit that Reply button if you have additional questions about managing reconciliation or entering adjustments. Have a great day ahead.