After you file

You can click on this link https://turbotax.intuit.com/ and at the top right corner as shown in the first image below, is the sign in button. If you click on that it will take you to the sign in page where you will enter your user id and password as seen in the second image. 

If you are having issues with signing into your account, you can use this link    https://myturbotax.intuit.com/account-recovery/ to recover your account with your phone number. If that doesn't work there is a small blue link at the bottom that says Try something else and if you click on that you can locate your account by using your SSN, name, and birthdate. 

If you still can't access your account, you can contact TurboTax Support for assistance by following this link https://ttlc.intuit.com/community/using-turbotax/help/what-is-the-turbotax-phone-number/00/25632