if the free ones would automatically populate for free I would totally use them just to not do the data input. But since they are all bs and don't actually do it for free I do the free fillable forms. Real pro tip is use a spreadsheet to add things up for wierd forms that don't do stuff for you. I put my 1099's in a spreadsheet and copied and pasted from it and it just made the whole thing easier to look over and verify. will do the same anytime I have multiples of the same form and then also for things like ira nonfillable pdf.