Hi,
I didn't say that you should update in my previous message. Are you mistaking with something else ?
Actually, updating won't change anything for your tax rules so that's not a solution here.
If you had followed the steps on the link I gave you, you should have working taxes on your website.
If that's not the case, you're missing something. But it could come from a lot of things.
Without knowing how your tax rules, tax zones, tax settings are setup, it's hard to tell you what to do to make it work.
You could provide screenshots of all of these so that we could check on them, or you could provide a backend access so that we could directly check them on your website.