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?
How to upgrade to PLUS
Note: While you still can, print a copy of your current year tax return and save it as a pdf, too. That way you will have it when you need it for school, a loan, etc. without going through a lot of aggravation to get it.