My reconciliation is off because I voided a cleared expense, how do I fix this?

Fixing your reconciliation in QuickBooks Online (QBO) is my priority, @DeckersNursery. This way, you can keep your financial data accurate and manage transactions accordingly.

You need to re-enter the cleared expense transaction you've voided to fix your reconciliation. To do this, you'll first have to visit the Audit Log page to gather the data you need (i.e., voided transaction's date and amount). Here's how:

1. Go to the Gear icon.
2. Select Audit log.
3. Use the fields to choose the appropriate User, Date changed, or Events filter to narrow the results.
4. Choose the View option under the History column to open transaction details. 

Then, re-enter the cleared expense transaction. For the detailed steps, please refer to this article: Enter and manage expenses in QuickBooks Online.

Once you're done, you can now continue your reconciliation. I'd recommend performing this process every month to monitor your expenses and detect any possible errors accordingly. You can check out this article for the step-by-step guide: Reconcile an account in QuickBooks Online.

Also, to further guide you in doing or fixing a reconciliation in QBO, I'd recommend checking out this article: Learn the reconcile workflow in QuickBooks.

Let me know in the comments if you have other reconciliation concerns and questions about managing transactions in QBO. I'm always ready to help. Take care, and I wish you continued success, @DeckersNursery.