incorrectThe information on the website is incorrect.
erroneousformalNo one could explain how the erroneous information had got into the report.
inaccurateTheir estimation of the cost was wildly(= extremely)inaccurate.
falsedisapprovingThe title gives a false impression of what the film is about.
fallaciousformalThe reports were fallacious and damaging.
untrueThe claims that he abandoned his child are simply untrue.
mistakenYou're mistaken if you believe we've discovered nothing of value.