Try this trick to print your return:
1) Login to your TurboTax account.
2) Select Show on your Tax Home screen, then Your tax returns and documents.
3) Make sure the current tax year is highlighted, then select Add a state.
(You won't actually add a state, but this trick should allow you access to your return to save and print).
The system is in transition from 2018 to 2019, so for now you can only print out the pages that would be necessary for filing a return by mail. You cannot get to the worksheets, etc. until the change is complete, which will be sometime in December.
Funny isn't it ... the actual filed return is only 4 pages however the larger PDF with all the excessive worksheets can but up to 200 more pages ... sure makes it seem like the program did a lot of work doesn't it.
Access to prior year returns
You can get a free transcript from the IRS:
How do I get a copy of a return I filed using online TurboTax?
How do I get a copy of a return I prepared using desktop TurboTax?
Note: Every year, before mid-October, print a copy of your current year tax return and save it as a tax file and pdf, too. That way you will have it when you need it for school, a loan, next year’s tax return, etc. without going through a lot of aggravation (and expense) to get it.
To add to Critter's post above, here's how you access your prior year's return.
You can access your prior year returns using the Documents tab in the navigation.
When you sign in, make sure you're using the same TurboTax account (with the same username) as in prior years.
I never had a chance to review my tax forms before submitting it and I want to make a copy for my records
To access your current or prior year online tax returns sign onto the TurboTax website with the userID you used to create the account - https://myturbotax.intuit.com/
Scroll down to the bottom of the screen and on the section Your tax returns & documents click on Show. Click on the Year and Click on Download/print return (PDF)
When you sign onto your online account and land on the Tax Home web page, scroll down and click on Add a state.
This will take you back to the 2019 online tax return.
Click on Tax Tools on the left side of the online program screen. Then click on Print Center. Then click on Print, save or preview this year's return. Choose the option Include government and TurboTax worksheets