Setting up a invoice. The "Product/Service" link not is activating?

Let's try to perform troubleshooting steps, @timothy10. This action helps aid the minor issues while working on your invoice and other tasks you want to accomplish in QuickBooks Online. I'll show you the method of how to do it.

When there is a cache, it affects the functionality of QuickBooks and might result in missing tabs and features. It is also a method to lessen issues that arises when using QuickBooks Online.

Follow the steps below:

1. Restart your browser.
2. Log in to your account and try in an incognito or private browser. You can use these keyboard shortcuts to launch a new private window:

• Google Chrome: press Ctrl + Shift + N
• Microsoft Edge: press Ctrl + Shift + N
• Firefox: press Shift + CTRL + P

 3. If it works on the private browser, go to the regular browser and clear your cache.

  4. Then, sign in back your account using your regular 

browser.

Also, the following computer operating systems and internet speeds are for the best QuickBooks Online performance: System requirements for QuickBooks Online.

If you encounter sign-in issues in your QuickBooks Online account, you can get an idea of how to fix them in this article: Fix common sign-in errors in QuickBooks Online.

Please notify me if there's anything I can help you with while navigating your QuickBooks Account. Thank you for visiting us today. Have a good one.