I'm here to help and ensure your changed tax is working with the invoice 1444 in QuickBooks Online.
Your browser’s overloaded cache could be the reason why you’re invoice 1444 won't work with the changed tax. Let’s perform the following troubleshooting steps to isolate this for a possible browser related issue.
We can press the F5 key on your keyboard to refresh the page. If still not working, you can use these keyboard shortcuts to access your account on a private window: