How do I fill out my tax form and put that I am a dependent? I have only seen the question if I have a dependent not if I am one.

I still live with my mother and don’t make a lot of money so I still depend on my mother. Last year I accidentally applied like a single person doing their taxes (that no one would claim me as a dependent), I don’t want that to happen again since I do depend on my mom for most of my expenses and want to be written on the tax form as her dependent.