I am trying to recover my 2018 return

First you'll need to recover your prior TurboTax account to access your 2018 return: 

https://ttlc.intuit.com/community/account-recovery/help/account-recovery-request-for-your-turbotax-account/00/25659

Once you have recovered your account you can use this FAQ to access a prior year return:

https://ttlc.intuit.com/community/prior-year-return/help/how-do-i-access-my-prior-year-return/00/27010

Also, you can request a tax transcript online from the IRS and you can usually get it the same day.