Maybe you have more than one TurboTax account. Many users do and just don't realize it. In order to access the return you've already completed and paid for, you need to use the EXACT account (same username and password) that you used when working on it. To see if you have more than one account, see the info below.
https://ttlc.intuit.com/replies/3302270
*** I am NOT a tax expert. I am a seasoned TurboTax user, and volunteer to provide assistance to TT users. Nothing I post is to be considered TAX ADVICE; I bear no legal liability for responses.***