On top of the free federal E-filing options, more and more states are also offering their own online income tax filing. This makes sense, as it reduces errors and saves the state from having to go through all those paper returns. Other states have partnered with some online preparers to offer free online filing for certain groups, such as the active military and those under a certain income limit.

So I decided to try and gather the information that was available for all 50 states. Some of these were hard to find! Be sure to read all the details, the offers can be confusing, and you might have to click on a specific link to qualify. Even if you don’t qualify for ...