I can help you sort this out, @gdatkinson.

Let's start by making sure that your QuickBooks software is updated to the latest version. This way, you'd see the Export button and continue with the process. Here's how:

1. Open your QuickBooks company file.
2. Click Company from the menu tab.
3. Choose Export Company to QuickBooks Online.
4. If you don’t see the Export button, update your QuickBooks Desktop to the latest version. 
5. Select either of the following:
   • I'm Ready to Move (if you already have an existing QBO account.)
   • Try it out (To sign up for a new QBO account.)
6. Click Continue.
7. Pick either of the following:
   • Yes, sign me in.
   • No, I need to create one.
8. Hit Continue.
9. Login to your QuickBooks Online account, then click Continue.
10. Choose Upload. 

Once completed, you’ll receive an email notification as a confirmation. You can read through this article to learn more about the step-by-step process: Move your QuickBooks Desktop file to QuickBooks Online.

Also, I'm adding these articles as additional information about the exporting process:

• How to fix errors when converting from QuickBooks Desktop to QuickBooks Online
• Common questions about importing data to QuickBooks Online

Visit us here again if you have other questions or concerns. The Community and I are always here to help.