Hi there,
Welcome to the Community. QB Online makes it easy to manage invoices and I'll be happy to give you a hand.
Based on what you've described, I recommend editing the original invoice. To do this, click on Sales on the left menu > navigate to Invoices > open the invoice in question > make appropriate changes and hit Save. It's important I have a visual representation what you're seeing so I can give you the exact steps. Feel free to comment below and also keep in mind that this is a public platform. You're more than welcome to cover any personal information if you choose to use screenshots to clarify what you're seeing.
In case you need further assistance, feel free to contact our support team using this link here.
