Welcome to the Community space, @mcervac.
Let me direct you to the best help for your Intercompany transactions setup.
Please know that Sage Timberline software is out of QuickBooks' scope. With that in mind, I recommend contacting their live support. You can ask specific questions about your intercompany setup and acquire exact advice to achieve your goal.
You might want to add users to your QuickBooks Online (QBO) account to help you manage it. Feel free to read this article: Add and manage users in QuickBooks Online.
For additional questions about managing your companies and their transactions, click the Reply button below. I'll be willing to help.
