How can I tell my mother in law to back off?

This is one of the harder problems of human life. I would say treat her like your own mother -- don't feel the need to be right all the time. If she says the sun and the moon have switched places, just agree! Valuing emotions over truth is truth.

It depends what she needs to back off from, maybe you can take her for coffee and have a chat about what is bothering you, it always work in your favour to be friends with the in laws :)

Respect her opinion and be assertive about why or why not you are accepting or rejecting the. Maintain your dignity and hers as well to ensure she does not feel negative towards you.

Well one thing to remember while confronting or telling your mother in law to back off is to be calm... You know sometimes one of life greatest frustrations is to not be able to fully open your emotion especially anger towards someone. But since its your mother in law, you also need to be respectful, not only because it's the mother of your husband, but because it's one of those person that makes your husband who he is today... And if she abuses you verbally, emotionally, and even physically, tell your husband or your parents or your're closest friends in order to sort things and know what you will do about it. It is also better to not play like a pity victim if something happens which is just not right, you can confront her for that not only because it's your're right but it is also your dignity and your pride that is hanging in a thread... Though, having such confrontation may lead to either a fight or reconciling, it is just best to tell the truth if your husband doesn't believe you because he takes on his mother's side then don't act like you're just going to ignore it, because you just cannot be ignorant in your own misery, and in the end it's still your choice and hopefully you don't end up miserable just because you let something off doesn't mean you can't do anything about it.

Well, first you need to say this to your partner. Maybe her child is the only person who has right to say this. But do you live with your in-law? It's better if you and your partner live alone. But if it's impossible in near future, then be patient.

Firstly, if there's a fight, wait until the fight is done. Then, you need to make sure that both you and your mother in law is in a good mood. Ask her for a little bit of time and tell her politely that you need to talk. Then, you could tell her how you feel about her intervening your business, your problems.

Talk to her, tell her politely how you respect her but do not want her interfering in every aspect.

Just tell her it's your issue and u can perfectly deal with it. So it would be nice if she back off..

Its a sensitive thing because you know.. mother in law, but you can try it on the nicest way you can tell her whats bothering you and that you need some space :)

Try to be very respectful :) Tell her what has been bothering you, why and if you can offer a solution to help or ask her to please ease up on it or that you want to handle it yourself and you appreciate their help.