Student loan when under 25 still living at home, worked for 5 years.

Hi,
I have worked full time for the past 5 years, I am 23 yrs old and still live at home with my parents. I am going to full time university this September and will have to quit my job to do so. I have got up to the question of 'have you financially supported yourself for 3 years'. I pay all of my own bills such as my car, my phone etc. But I must admit I don't pay rent or anything like that to my parents. So I was wondering what answer is best to put as I do have proof of P60s.
Thank you in advance ☺️