I need to install quickbooks online from mt existing laptop onto another laptop.

I see how concerning your experience is. Installing QuickBooks Online on your new laptop is a straightforward process, useredward.

Your laptop or computer should be a Windows 64-bit system. Then, here are the steps to download it to your new device successfully.
 

1. Open a web browser on your new laptop.
2. Go to the QuickBooks Online website and log in.
3. Click the Gear icon on the QBO Home page.
4. Select Get the desktop app. The app will install automatically.
   

If it doesn't install automatically, I suggest you check out this article: Use the QuickBooks Online desktop app. Go to the Download the QuickBooks desktop app section to learn the steps needed to complete the process.

After completing the process, QuickBooks Online will automatically allow you to use it without signing in again for six months.

I have some links for you where you can find tips about keyboard shortcuts to speed up navigation if you need to use QuickBooks in your web browsers.

• Keyboard shortcuts for QuickBooks Online. 
• Create a desktop shortcut for QuickBooks Online.

You can post again in this thread to ask questions about downloading QuickBooks Online or anything related to the program. I'm here to help.