Yes, @SampleAccountOwner6. Depending on how long your account has been active, you have two options to start a sample company in QuickBooks over again.
If your books are less than 90 days old, you can purge your company data and start fresh. These actions are only for QuickBooks Online Essentials, QuickBooks Online Plus, and QuickBooks Online Advanced. If you're using QuickBooks Online Simple Start, you can follow the second option.
Choose your industry and select Create accounts based on my industry.
Click Wipe data.
Important: If you've connected bank accounts or third-party apps, purging your company may permanently break these links. Make sure you're ready before you proceed.