Free Turbo Tax online for State Farm customers

If you're a State Farm policyholder, log on to your account to see the link to TurboTax Online (in the left-hand pane).

Free completion and filing of "Essentials" and "Basic", and discounted "Premier" ($20). From TurboTax's comparison tables, it looks like the only thing Premier gets you is additional "guidance".

If you haven't yet signed up on statefarm.com, you need to register and enter some policy info to get access.

I was able to file my federal and state taxes electronically for free!