The I-864ez says,
Item Numbers 5.a. - 6.c. Federal Income Tax Information. You must provide either an IRS transcript or a photocopy from your own records of your Federal individual income tax return for the most recent tax year. If you believe additional returns may help you to establish your ability to maintain sufficient income, you may submit transcripts or photocopies of your Federal individual income tax returns for the three most recent years.
You are not required to have the IRS certify the transcript or photocopy unless specifically instructed to do so by a Government official; a plain transcript or photocopy is acceptable
Does the print out from a digitally filed TurboTax return qualify as acceptable?