An Annulment results in a declaration from the court that the marriage never existed. Grounds for an Annulment include, but are not limited to, misrepresentation, concealment and misunderstanding. There is no time limit for filing an action to have a marriage annulled, but the party seeking an annulment must act within a reasonable period of time after discovery of the misrepresentation or other reason for the Annulment. Courts will generally not grant annulments when children have been born to the marriage.
The elements that need to be established to entitled you to an Annulment are not just showing that there was a misrepresentation, concealment or misunderstanding, but you must also prove that had you known the truth, you would not have married that individual.