I sent a bank transfer to a closed bank account. Can I void the transfer?

Welcome to the Community, @A Benini. I'm here to provide information about how to void or cancel the transaction..

To begin, if you've manually recorded the transfer through QuickBooks Online (QBO), you'll just have to void or delete the recorded transfer. Here's how:

1. Go to the Audit Log or the Search/Magnifying glass icon and find your recorded Transfer.
2. Select the recorded Transfer and beside the Make recurring option, click the More menu.
3. Select either Void or Delete and click Yes.

However, if you're referring to the transfer of your QuickBooks Checking, you'll have to contact your bank to void the transfer.

For future reference, you can check this to help you void and delete a transaction in QBO: Void or delete transactions.

If you have any concerns about voiding the transfer, please tag me in the comment section, @A Benini. I'll assist you in any way possible.