New Hampshire Department of Revenue AdministrationThe mission of the Department of Revenue Administration is to fairly and efficiently administer the tax laws of the State of New Hampshire, collecting the proper amount of taxes due, incurring the least cost to the taxpayers, in a manner that merits the highest degree of public confidence in our integrity. Further, we will provide prompt and constructive assistance to the municipal units of government in matters of budget, finance, and the appraisal of real estate.