I am trying to activate the different tax agencies but gives error "Give us a few minutes and try again. If it still doesn’t work, call us so we can take a closer look."

Welcome to the Community forum, adetitsolutions

I've checked our system and confirmed that no other users have reported issues with the same problem.

To isolate this, we'll perform troubleshooting steps to identify web issues or any cache-related problems. Let's begin by logging into your account in a private browser. Use the keyboard shortcuts listed below depending on your browser:
:

• Google Chrome and Microsoft Edge: press Ctrl + Shift + N 
• Mozilla Firefox: press Ctrl + Shift + P
• Safari: press Command + Shift + N

If you're able to set up taxes using a private/incognito window, you can go back to your regular browsing window and clear its cache.

Alternatively, you can use other supported browsers for the best experience while working in QuickBooks Online.

Feel free to return to this thread if you have other questions or have other tax-related concerns. I'll be here to assist. Take care!