Starting a business as an independent contractor

[Ross Benedict]

This is a little off topic in regards to real estate but I've had such positive experiences on bigger pockets I'm hoping someone can share some insight with me. I currently work as a physical therapist part time for a hospital and also work as an independent contractor ("1099 employee") for two other companies. As I'll be paying my own taxes this year I would like to start taking advantage of certain write offs. I should also mention I currently have my own liability insurance as a practitioner. My question is does it make sense to start my own business such as an S Corp or LLC in order to reap more benefits as an independent contractor even if I would be the only employee? Or can I still take advantage without starting my own business in order to lesson the quarterly tax blow. Any feedback would be greatly appreciated, thank you!