Hello there, Jessica.
QuickBooks Online desktop app currently doesn't support direct printing of receipts with barcode. However, there's still a way and I'm here to show you how.
By using a third-party application you can seamlessly print barcodes in QuickBooks Online. Feel free to browse the QBO app market to look for a third-party application that have this feature.
Furthermore, you can also consider customizing your sales forms to personalize your sent forms to your customers in QuickBooks Online.
Additionally, our QuickBooks Live Expert Assisted is here to help you utilize using third-party application to fulfill your business needs within QuickBooks Online. I highly recommend checking out their services. Their support can greatly enhance your business workflow and provide you with valuable assistance.
Please feel free to leave a reply if you have additional concerns besides printing barcodes using QBO desktop app. I'm always here to assist you.