TurboTax Free Edition is very limited. It's only for the simplest tax returns. But if you have pension or IRA income on a 1099-R, with no complications, you can probably use Free Edition.
If your AGI is $79,000 or less you can probably use IRS Free File.
And the IRS is testing a pilot program called Direct File ... https://www.irs.gov/about-irs/strategic-plan/direct-file
