I worked for TutorABC and they did not take taxes out. They are not supplying me with a w-2, and are a Tawainese company. What does this mean for my taxes?

It means they consider you self-employed and you need to file as a sole proprietorship business owner.

How do I report it? As 1099 Misc or additional income?

You would report it as if you received a Form 1099-MISC with the amount in Box 7.

so if you do not have their federal identification number do you just leave it blank?

I work for tutorabc I just wanted to verify whether or not they take out taxes. My first check they didn't, but I read that if you make $900 or more they take 18% at which point we are double taxed. Is that true? Also if we fill out the 1099 will the form go through without a federal id or social security number  of the company listed?