Free tax filing software

I recommend  https://www.freetaxusa.com/

I have used it several years for my Federal income tax and it worked perfectly.  This year I had a more complicated filing (K-1 schedule, property loss) and it was able to handle everything.   Even with free version got prompt replies to my 2 questions.

Here is a review:

https://www.businessinsider.com/personal-finance/freetaxusa-review