That would completely depend on your age. How old are you?
How to stop mother forcing me to wear formal clothes all the time?
You can stop when you're 42.
Moms know best.
There is no one answer to a question that is posed about stopping a mother from doing something she deems right and appropriate. Too many variables involved to even remotely suggest a remedy. Your age (for example) makes a huge difference about what your rights are, and whether or not your mother has that much control about what you wear. Whether you are 13 or you are 30 .. Your age makes a big difference.
Why is she forcing you to do that? We don't know the whole story or your age, etc. It's pretty difficult to advise you. I'd like to hear your Mom's side of this.
You can pay rent and get a job of your own. If you're too young for both, you are screwed.