Your information on my Father, John H Farrar Jr is wrong and incomplete. You have him marrying his first wife, Dorothy, three months BEFORE he was born. They had four children, John H Farrar III, Frederick Lyons Farrar, Douglas Patch Farrar, and Virginia Lee Riverbank (nee Farrar). After their divorce, he married my mother, Tamar Farrar (nee Agmon). Their children are Ilan William Farrar (me) and Sharon Mabel Farrar, who now goes by Sharone Hannah Marraccinni.
From your comments, I assume you believe your message is being read by an administrator of Family Tree. This forum provides advice from volunteers - other FamilySearch users, who feel qualified to answer particular queries.
In your case, you do not provide enough information to enable anyone to guide you through the process to correct any incorrect data. We can only assume you are actually talking about details on your father's Family Tree entry. Please provide further details, but realise we generally have to make the corrections ourselves, as there are no FamilySearch employees to do this for us.
Paul is correct on "user" centric message board and empowerment to same "users", including yourself, to work on this "one big shared collaborative world tree".
L2S9-679 is the personal id number for your father's "profile".
The marriage details including date can be easily edited/corrected by clicking on the "pencil in box" edit link to the right of the marriage date and location for your father and Dorothy. If you don't have a specific date, you can always edit the date with a "before XXXX" until a reliable source you, or someone else contributing, are comfortable with the change.
Only profiles of individuals who have passed are visible for all to view and/or edit. Living individuals can be entered but visible to the user who entered/shared. As an aside, historically, genealogists keep private info. on living individuals. In the current trend of "Internet genealogy" with Findagrave.com and readily available obituaries which contain info. on living individuals, that old black and white understanding has been greyed and muddied a bit. As my mother was a victim of an "elder scam" I appreciate Family Searches Family Tree honoring the concept of keeping living individual information private.
Enjoy the family research journey, you honor your father by caring to try to keep his life story as accurate as possible. His bio at Findagrave is amazing...what memories you must have!