is Ms. and or Mrs. correct for a married woman?
Anonymousis Ms. and or Mrs. correct for a married woman?

'Mrs.' is for a married woman.
'Ms.' is used by a woman who does not want to let others know whether she is married or not. 
Veteran Member8,073
I have been told ether or it depends on what the woman wants to go by.
Looking for ESL work?: Try our EFL / TOEFL / ESL Jobs Section!
Yoong Liat'Ms.' is used by a woman who does not want to let others know whether she is married or not.
Or if it doesn't matter to her!
Veteran Member24,100
Moderator: A super-user who takes care of the forums. You have the ability to message a moderator privately should you wish. These users have a range of elevated privileges including the deletion, editing and movement of posts when needed.Proficient Speaker: Users in this role are known to maintain an excellent grasp of the English language. You can only be promoted to this role by the Englishforums team.