Thanks for letting us know about your concern today. I'm here to help ensure you're able to view the Sales Tax Center option in QuickBooks Online (QBO).
I've checked our investigation list, but we haven't received any reports about this issue. To check if it's caused by the browser, let's process troubleshooting steps by using incognito/private mode. This mode doesn't use the existing cache data files to load a webpage.
Here are the keyboard shortcuts to open a private browser:
Google Chrome: press Ctrl+Shift+N
Mozilla Firefox: press Ctrl+Shift+P
Internet Explorer: press Ctrl+Shift+P
Safari: press Command+Shift+N
If you're able to view the Sales Tax Center with a private browser, , I suggest clearing your browser's cache to start fresh. The next time you log in to QuickBooks Online, your browser will download fresh copies of everything you see on each page. Any cache-related issues should be cleared up.
However, if the same thing happens, I recommend contacting our QuickBooks Online Support Team. They have additional tools to pull up your account and investigate this further.