If you didn’t file last year and you’re in TurboTax, just tell us that
when we ask you. But if you’ve already entered a number for your AGI,
manually enter 0 instead.
If you can’t get your AGI for e-file, don’t worry. You can still file a
paper return by printing out copies of your federal and state returns
and mailing them in. For information on where to send your return, go to
the IRS site
Where to File Paper Tax Returns With or Without a Payment
.