How do I convert to 10.00 plan?

Hi, John. There isn't a way to switch a QuickBooks Solopreneur subscription to QuickBooks Lite. You will need to cancel your QuickBooks Solopreneur subscription first. Then, you can subscribe to QuickBooks Lite using the same Intuit username and password.
 

You can cancel your QuickBooks Solopreneur subscription here: Cancel your subscription.

After canceling, visit this link, click See plans and pricing, and then select Buy now. From there, sign in with your existing credentials by selecting Sign In next to Already have an account.
Note: The $10 per month subscription promo is good for three months upon subscribing to the plan.

Once you’ve signed up for QuickBooks Lite, you can import your transactions by connecting your bank accounts.

Let us know if you need anything else.