I am having trouble signing in to review my 2016 return. Please advise as to the easiest way to do so as I entered what I thought was the correct user name and password.

[DoninGA · Accepted solution]

Close all TurboTax windows on your web browser (including this one).  Copy and paste the account recovery website link onto a new web browser window and run the tool.

Use this TurboTax account recovery website to get a list of all the user ID's for an email address.  Run the tool against any email addresses you may have used - https://myturbotax.intuit.com/account-recovery

If none of the user ID's received will access your 2016 account, then use the option shown in blue on the account recovery website, "Try something else"