Greetings, aturchetti.

I'm here to assist you with your question about downgrading QuickBooks Online subscription.

Once you cancel your subscription, you'll have read-only access to your data for only one year. If you want to retain your information and downgrade to a lower version, you can do this directly through your existing account.

For the detailed steps and the things you need to know before downgrading, please visit the article I'm adding below:

Downgrade your QuickBooks Online subscription.

In case you want to know more about what happens to your data upon canceling, I'm adding this article as well for additional reference:

What happens to my QuickBooks Online data after I cancel?.

I'm always available here if you need additional assistance with the migration. The Community has your back.