When permanent marker gets onto clothes and dries it can be hard to remove the permanent marker from the clothes with many other cleaning products.
But what does work at removing permanent marker on clothes and fabric is rubbing alcohol.
Take a sponge or cloth and dip it or soak it in some rubbing alcohol and then dab the sponge or cloth around the stain and then dab the sponge or cloth onto the permanent marker stain too.
The permanent marker stain should start coming off the clothing and then you can wash it normally in the washing machine.