Also check the list of forms that are NOT supported. Notably, it does not support multiple state filings, part-year state filing, foreign earned income, married filing separately returns in community property states, or state filing without a federal filing. https://help.creditkarma.com/hc/e...5004664123
If you're just doing 1040EZ and have no deductions turbo tax is free too. But on an itemized return it is more than adequate with some extra reading and due diligence in figuring taxes in two different software.