Hi Quickbooks, I'm having trouble with my desktop app everytime I try to open a second tab to work, it logs me out and I need to sign in again. What is the issue?

I'd be glad to help you fix this, @GS Bonaire.

To start, make sure that the desktop app version and OS are updated. Then, let's clear the Window App's Cache for good measure. Let me show you how: 

1. Go to the Help menu on the navigation bar at the top.
2. Choose Reset App Data.
3. Allow a moment for the process to complete, and then close the app.
4. Be sure to right-click the app and Run as Administrator when re-opening.

If resetting the App Data still doesn't make a difference, I suggest uninstalling and reinstalling the program. The steps below will help you accomplish this:

1. The method for uninstalling the App varies based on which version of Windows you're using. Refer to the QBO Windows App Help Guide under the How do I uninstall? section.
2. Once uninstalled, you'll still need to delete the locally stored settings. 
3. Look for the QuickBooks folder. If you see a Roaming folder instead, open it first. Right-click and Delete the QuickBooks folder.
4. Using the guide in Step 1, under the How do I install the app? section, re-install the QBO app based on the instructions for your version of Windows. 

Meanwhile, I'll be adding this Community resource in case you've got other QuickBooks concerns such as setting up payments, managing your income and expenses, running reports, etc. Please refer to this article for more details: Community help articles.

Please keep me posted on your results with this here, the Community has you covered. Thanks again, I'll be standing by for your response.