If the error, Access Denied 1020 occurs, work through the following:
Confirm you are using the correct URL for Tax.
Clear your browser cache and cookies of 'All Time'.
Load the browser in Incognito or InPrivate browsing mode.
Try using a different web browser.
Attempt to log in on a different computer.
If available, attempt using a different Internet connection, such as a Mobile hotspot from mobile device.
Note: If Hot-spotting, check with your data provider for any costs associated with the service.