Although it is now accepted that data should be made available on request, the current regulations regarding the availability of software are inconsistent.
On the subject of finding cars with the best mileage, though the EPA issues industry-accepted fuel-efficiency data, we must add that the agency has come under fire in recent years for conducting mileage tests that don't approximate typical driving.
Moreover, she says, it's impossible to know whether too many or too few offers are being made and accepted, because the IRS hasn't compiled enough data about who's accepted and rejected, how old their debts are or how much is later collected from those who are turned down.