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?
If you have to pay to access your 2016 return, remember it when you file you 2017 return. SAVE a pdf of your tax return while you can, and save your important tax documents like your W-2's and 1099's etc. as well.