https://ttlc.intuit.com/community/prior-year-return/help/how-do-i-access-my-prior-year-return/00/270...

You can get a free transcript from the IRS:   

https://www.irs.gov/individuals/get-transcript

How do I get a copy of a return I prepared using desktop TurboTax?

https://ttlc.intuit.com/questions/1900639

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.

https://ttlc.intuit.com/questions/1899645-how-do-i-save-my-2018-turbotax-online-return-as-a-tax-data...

https://ttlc.intuit.com/questions/1912544-how-do-i-save-my-2018-turbotax-online-return-as-a-pdf

If you prepared in TurboTax Online, here is how to access your prior return:

1. Make sure you’re signed in to your TurboTax account you used last year.
2. Select Tax Home from the left menu.
3. Scroll down to Your tax returns & documents and select 2018.
4. Select View adjusted gross Income (AGI)

If you prepared your tax return in TurboTax CD/Download, it should be saved on your computer.