Change my subscription to small business?

Welcome and thank you for choosing QuickBooks, @lluquette. 

To review each subscription level to select the best version of QuickBooks for your small business, see this article: Pricing and subscription levels for QuickBooks Online. 

You can check our plans and pricing for QuickBooks Online by going to this link: https://quickbooks.intuit.com/. 

Here's a guide when you switch from QuickBooks Desktop to QuickBooks Online: The QuickBooks Guide to Converting QuickBooks Desktop to QuickBooks Online. If you're from QuickBooks Self-Employed: Switch from QuickBooks Self-Employed to QuickBooks Online. 

Let me know how if you need further help in subscribing to QuickBooks. I'm here to assist. Have a great rest of the day!

If you have anything other than the Self-Employed "freelancer" version then you already have a "small business" version. There is no way for anyone here to know what you have unless you tell us. Even the paid staff that posts on this site do not have ability to view your account.  If you purchased the wrong subscription and within thirty days need to change they should honor that. There is no migration capability from SE to QBO so any data you have entered will have to be re-entered in the different version