@ 511633kcsd0352
Also, before trying to start that new account, empty your browser Internet cache, close the browser, then reopen it. Hopefully, that will prevent any looping. Then go the link DoninGA provided above. As DoninGA mentioned, if your current User ID is linked to the "test account", you would need to use a different User ID. It can be a different email address, part of an email address, or something else.
As for the "test account" notice, were you by any chance trying to use a TurboTax employee account?
Addendum:
Also first see my next comment below on how to look to see if you already have another account.
