Solved
I still have 2015 W2 with me.
To access your prior year returns, you will need to sign in with the same TurboTax account that you used previously. Please note, there can be multiple TurboTax accounts associated with a single email address.
To recover your previous TurboTax account, please follow the instructions below.
https://ttlc.intuit.com/replies/3302318https://ttlc.intuit.com/replies/3301525
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.