I can also vouch for FreeTaxUSA, I’ve compared it against a few major tax companies and at least for relatively simple stuff, they were totally identical results, and just as easy to use.

There are a few options for free filing based on income (generally, lower that $79k) here: irs.gov/…/free-file-do-your-federal-taxes-for-fre…

And if you’re in one of 12 lucky states, there’s an IRS Direct File trial program:

Arizona
California
Florida
Massachusetts
Nevada
New Hampshire
New York
South Dakota
Tennessee
Texas
Washington state
Wyoming