Use the
following tool to check for multiple accounts (user ID's) even if you think you
only have 1. Run the tool on each email address you have.
https://myturbotax.intuit.com/account-recovery/
If that
didn't find another account, run the tool again, but this time choose the tiny
blue link that says "I don't know my email address or User ID", and
it will look you up by SSN and other data.