I have already created tax in Quickbooks online. I want to change the tax agency name. But I dont see a option to do it.

Welcome to the Community, Andun. You can change the tax agency name by clicking Edit [your tax agency name] on the Tax overview page and selecting the Edit settings option. Please see the screenshots below for guidance:

If you can't see the option, log out and then log back in to your QuickBooks Online (QBO) account, or open your account in a private/incognito window to rule out any temporary browser issues. Also, use a supported web browser for the best experience.

Should you have any further concerns, don't hesitate to leave a message in the thread. We're here to help 24/7.