Yes, you can still combine them to one sign-in, @CGold.

First, choose an email address you’d like to use for all your companies. Then, you’ll want to send an invite.

Let's say your primary account has a credential of MadelynC@sample.com and the password is Sample123. You’ll want to log in to the other account and invite MadelynC@sample.com. Make sure you have the same password. Otherwise, you’ll need to change your password first.

Here’s how:

1. Sign in to QuickBooks.
2. Go to the Gear icon, then select Manage Users.
3. Click Add User.
4. You can select Company admin as user type.
5. Click Next, then select All.
6. Enter your name and the email (MadelynC@sample.com).
7. Hit Save.

You’ll receive an email notification after. Make sure to select the invite link so you can access the account. Check out this article to learn more about the process: Sign in to multiple QuickBooks Online companies with one user ID.

This guide will provide you information on how to switch between company files and move them to the same account: Manage multiple company files.

Keep me posted if you have additional questions in managing your accounts. I'll get back to you as soon as I can. Have a great day ahead!