What vitamins should I take 26 year old female?

Healthy diet. Generally, a healthy diet should include all the vitamins which are necessary. With that said, you should check with your doctor. He may desire to do blood tests looking at certain levels. Prenatal vitamins should be important if you are pregnant, or expecting pregnancy.
Multivits. I suggest Kirkland ( costco) or Centrum; howver, they are all basically the same.