Hi there, autosmarteuan.
Yes, you can upgrade your QuickBooks Online Simple Start to QuickBooks Online Plus without taking out a new subscription. The upgrade process allows you to retain your existing account, data, and setup while accessing advanced features available in the higher-tier plan.
To assist with the process, ensure you're logged in as the Primary Admin on the account. Then, follow these steps:
- Navigate to Settings and select Subscriptions and billing.
- Verify that your payment info is up to date.
- In the QuickBooks Online section, click Upgrade your plan.
- Review the available options and then select Choose plan.
- Then, follow the on-screen steps to complete your upgrade.

If you need additional help with managing your account, feel free to let me know on this thread.