You have to sign onto your download account using the exact same user ID you used to purchase the software - https://shop.turbotax.intuit.com/commerce/account/secure/login.jsp?pagecontext=download
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 download account with the software purchase, then use the option shown in blue on the account recovery website, "Try something else"
Otherwise you are going to have to contact TurboTax support and speak directly with a support agent for this issue.
See this TurboTax support FAQ for a contact link and hours of operation - https://ttlc.intuit.com/questions/1899263-what-is-the-turbotax-phone-number
To contact TurboTax customer service/support use their contact website during business hours.
Submit your question/problem during business hours and then use the option for Call (a phone number will be provided for Call) to speak directly with a TurboTax agent -
https://support.turbotax.intuit.com/contact/
Note: The Call option will not be available when TurboTax Support is closed.
