Accountant could open invite but my company isn't appearing in the invite I had sent him.

Hi there, Joshua.

I can see the urgency of being able to have your accountant access your company as soon as possible. 

I have looked into our records and found that other users have reported the same issue. Right now, our product engineers are investigating the root cause and working on a fix. In the meantime, I'd suggest contacting our Customer Care Team. They can add you to our notification list and keep you updated on the progress of the investigation.

To reach them, click the ? Help button at the top-right corner and select Contact Us to talk with a live agent. 

For future help, you can check out this article to help guide you in managing users: Add and manage users in QuickBooks Online.

If you have further questions about adding an accountant, let me know by commenting below. I'll be here to lend a hand. Have a great day!