Either Voiding or Deleting a vendor check issued in a prior period.

Welcome to the Community, LOMF. 

Let me share details on how you can the check remove the check that was issued way back in June 2023 to a vendor that was inactive and has been outstanding in your reconciliation in your QuickBooks Online (QBO) account. 

When creating a bank deposit to offset a check, ensure the details match, especially the bank the check was deposited to.

After that you can offset the check by following the steps, I'll provide below.

1. Go to your Chart of Accounts.
2. Look for the account categorized the transaction into, then select View Register.
3. Find the transaction, then click it to expand the view.
4. Choose the box in the checkmark column until you see an R. This manually reconciles the transaction.
5. Tap Save. 

If you still see an alert the next time you reconcile, open the discrepancy report. Open the discrepancy report if you still get an alert next time you reconcile, there may still be a deleted transaction on the list, but the difference should be $0.00. It's not going to affect your reconciliation.

Upon doing this, I highly suggest contacting your accountant to guide you in reconciling the account. If you don't have an accountant, visit this page to find an accountant for your business: Find a QuickBooks ProAdvisor.

Additionally, if you have plans to inactivate an account in your chart of accounts, check this article: Make an account inactive on your chart of accounts in QuickBooks Online.

Don't hesitate to leave a comment if you have further banking transaction inquiries in QBO. I'll be sure to respond to them in no time. Have a great day ahead!