Comment by mortos

The IRS provides a list of free filing websites: https://apps.irs.gov/app/freeFile/browse-all-offers/

I believe they may even pay these companies to offer the service.

Free Tax USA doesn't have an income limit, and may be the only one, so I've used them for at least 5 years. They charge $10 for state filing, so I use CalFile instead.

My tax situation is pretty simple and they've filled my needs. The only issue I've had is with exempting Treasury bills from state tax but I don't file state with them anyway so maybe I missed something.