How can you get a testostron level check for a female?

Same as a guy: Ask your doctor for a blood test, same way it's checked in men. Of course, the normal reference range will be much lower. But be clear as to why you want to know. Are you worried about too much or too little testosterone? Talk to your family physician about your concerns so that s/he can best assist you in optimizing your health (as opposed to mechanically ordering a single test).