After you file

Was it prepared with Online TurboTax?

If so, what is the roadblock?     Do you not find it in that account?  Or do you find it OK, but when you click to download, is there some kind of problem?

 

Log in and look in the section "Your Tax Returns & Documents", expand that section, and choose tax year 2018.  Then look for a link "Download/print the PDF."   If it's not in that account, then you likely have multiple accounts, and we can tell you how to find the right one.