Welcome to the Community space, @statesvillebb. I can guide you through editing Time Off entries in QuickBooks Online (QBO).
First, there's no need to unapprove time off entries to make changes. For your convenience, I'll outline the complete process below:
- Log in to your QBO account.
- Go to the Time option to open QuickBooks Time.
- Navigate to the Time Off button and choose Approved.
- Click the entry you need to update.
- Hit the Edit menu to make changes.

Moreover, you can refer to this resource to help you effectively manage time off entries in QBO: Manage time off entries for team members for QuickBooks Time.
Please comment below if you need further assistance managing time off entries in QuickBooks. We're always here to assist you anytime, @statesvillebb. Stay safe!