Who does your taxes? H&R Block? TurboTax? A CPA/Tax Professional? Yourself? Check out this web map by ESRI. ESRI says it used data at the census tract and block group level. It looked at whether taxpayers used H&R Block, TurboTax, a certified public accountant or other tax professional, or did their taxes on their own. ESRI then credited that block to which ever method was used the most. Click on a point and get the breakdown of tax methods.