The H&R Block state of Michigan software calculated the wrong numbers for my 2021 tax year. The state has to re-calculate the refund to a 20% lower refund. After researching it I discovered the state was correct and H&R Block was wrong. Not a good thing after paying for software that was incorrect.
I've been a fan of Taxcut for several years, and appreciate the ability to use it offline and for multiple returns and multiple states (with purchase after the first free one). It is in general easy to use and simplifies the tax process.